Daiyu Hai is a daughter of Aigaios.[1] She appears in the plot The Summer Queen.[2]


Daiyu has pale skin, a square face, and dark brown eyes. Her hair is black and styled in a short undercut. She has a few scars on her arms and legs. Daiyu has an almost constant poker face, making her even more robotic.


Daiyu, like Chinatsu, was raised to be a killer. She looks up to and is fiercely loyal to Chinatsu, and was practically her lackey for a few years. Daiyu is extremely efficient, and does not prioritize. She is equally prepared to die helping unload a shipment of drugs as she is kidnapping a certain child (oops) and as a result treats everything as just another task to be completed as quickly and cleanly as possible. Daiyu also rarely speaks, as she considers words a waste of time and energy. All in all, she resembles a robot in a slightly eerie way. However, she considers anyone who gets close to Chinatsu a rival for the number 2 seat in the criminal world, and treats them as such.

Story Edit

Like Chinatsu, Daiyu grew up inside Rothbart's empire. Daiyu's mother worked for Chinatsu's father, so Daiyu and Chinatsu often trained together. While the two girls weren't exactly friends (Daiyu was more like Chinatsu's lackey/assistant) they were closer than most children in the branch and were occasionally paired up for requests and missions. For the next few years, the two girls recieved the standard training all the branch children had undergone, but with a slight bit of favoritism because of Chinatsu's status.

Daiyu, like Chinatsu, was assigned a codename inside Rothbart's empire. She became known as Hydra, as her father was Aigaios, an old sea deity who had been an ally of the Titans in the Second Titan War.

Daiyu was 14 when she first heard Chinatsu's complaints about her share of the empire's profits. At first, Daiyu was shocked. Nobody who wanted to keep their heads on their shoulders questioned Rothbart. But as time went on, Daiyu found herself agreeing with Chinatsu and wanting to help her overthrow Rothbart. So when Daiyu was promoted to Rothbart's personal guard in Detroit, she and Chinatsu began making plans for a coup d'état.

Shortly after Daiyu was promoted, Chinatsu's father was executed by Rothbart and Chinatsu fled the empire, escaping to Camp Half-Blood. Chinatsu contacted Daiyu right before she left, promising to return with supplies and finally complete their plan. Daiyu waited another year for Chinatsu's return, and assisted in overthrowing Rothbart's son, Dile.

Fatal Flaw Edit

Daiyu is almost completely uncapable of acting on her own. She needs a leader to look up to and stand behind, someone to give her orders and tell her the exact task she's been assigned. However, she's also clingy and easily made jealous, and will fiercly compete for said leader's attention. Not so much that she comes off as an annoying hindrance, but the envy will definitely be there, bubbling and waiting for Daiyu to eventually pop and explode.

Ablilities & Items Edit

Powers Edit

  • Daiyu's only power is that she can manipulate water. If she's very close to a large water source, she might be able to summon a small storm, but other than that it's nothing special. The water has to be visible for her to manipulate it, and when she does, it's just water.

Weapons Edit

  • PGM Hécate II: Daiyu has been trained as a sniper, and the Hécate II has been her rifle of choice ever since she's learned to shoot.
  • Beretta Px4 Storm Subcompact: This handgun is mostly a backup, in case Daiyu is involved in any close-quarters altercations.
  • Dagger: Just your average steel/Celestial Bronze dagger. Nothing really special. Like Daiyu's handgun, it's a backup weapon.

Strengths & Weaknesses Edit

Strengths Edit

  • Efficiency/Practicality: Like Chinatsu and unlike Dile and Rothbart, Daiyu treats everything with an almost ruthless efficiency. She accomplishes each task without getting sidetracked or distracted, and without leaving loose ends. She doesn't go and blow up a building to add dramatic flair, nor does she torture a target just for the fun of it. She gets things done quickly and cleanly.
  • Daiyu's training underneath Rothbart has also provided her with a few skills:
  • Accuracy with a gun: Daiyu basically played the role of sniper whenever she and Chinatsu were paired off. Like Chinatsu, she's trained with guns almost before she learned to walk. Though she's not as talented with a handgun as a sniper rifle, she's still fairly decent.
  • Daiyu can do a few martial arts.
  • Daiyu's been taught how to live off the land and use a few plants to her advantage. She can distinguish between most edible and toxic plants, and as a result can mix simple poisons from wild herbs.
  • Daiyu can set up and dismantle simple traps and explosives.
  • Daiyu has learned how to track down a target, but primarily relies on technology to do so.

Weaknesses Edit

  • Loyalty: Daiyu's unwavering allegiance to Chinatsu means she can be easily manipulated into doing something reckless or stupid. If Chinatsu is killed or goes missing, Daiyu will stop at nothing to recover her or get revenge. Not to mention that she does pretty much anything Chinatsu tells her to. There is a constant hunger in Daiyu to please Chinatsu, and it does her more bad than good.
  • Envy/Clinginess: Daiyu treats everyone Chinatsu knows as a rival for the number two seat in the criminal world and Chinatsu's attention. This is quite the detriment to her teamwork and social skills.
  • Tunnel Vision: Daiyu's efficiency and lack of prioritization make her oblivious to anything other than the task at hand. Even if Lysimar was somehow resurrected, got his hands on Michiko, and was destroying the world country by country, she would continue onwards with whatever she's been assigned.
  • No communication skills: Unlike Chinatsu, Daiyu is not a smooth talker. Due to her tendency to speak as little as possible and her bringing up in Rothbart's empire, she's terrible at talking to people. She prefers to let Chinatsu do all the talking for her, which suits Chinatsu just fine.
  • Daiyu is neither agile nor particularly quick. She's a sniper, really, and is used to more or less staying in one place and shooting the target from outside their range.
  • Without a leader, Daiyu would break down and cease to function. She's like those minions from Despicable Me: she has to serve the biggest, baddest boss around or she doesn't have a purpose in life.

Likes & Dislikes Edit

Likes Edit

  • Chinatsu
  • Organization and structure
  • Efficiency/getting tasks done quickly

Dislikes Edit

  • Disorganization
  • Wasting time or resources
  • Torture for petty reasons (this pretty much fits under wasting time but I'd like to highlight this and point it out)
  • Talking to people in general
  • Anyone who gets just a bit too close to Chinatsu
  • Chinatsu ignoring her


  • Hydra was created by Pi on October 5th, 2015, and accepted by Josh on October 6th, 2015.
  • While Chinatsu was originaly created for the SAO fanfic Through A Killer's Eyes, Hydra was solely created for the purpose of appearing in The Summer Queen as Chinatsu's lackey.
  • Hydra has the shortest lifespan of any character created on DP, being alive for a total of 17 days, as she originally debuted on September 26th, 2015[3]

Reference ListEdit

  1. Hydra's Biography, Demigod Creator, post 1456.
  2. First page of The Summer Queen topic
  3. Hydra's Debut on DP, Demigod Roleplay #6 topic, post 4471.


Characters Navigation
[v · e · ?]
Cabins 1-5
Cabin One
Zeus/Jupiter Cabin: Alaric Kinoshita  •  Blade Runner  •  Blythe Morgan  •  Jake Jones  •  Jake Thompson  •  Jason Grace  •  Lani Presley  •  Steven Morgan  •  Thalia Grace
Cabin Two
Hera/Juno Cabin: None
Cabin Three
Poseidon/Neptune Cabin: Caspian Marshall  •  Coral Waters  •  Gabbi Pencera  •  Hunter Persaud  •  Hyder Persaud  •  Jace Wood  •  Lori Owens  •  Percy Jackson  •  Star Luna  •  Tate Kyle  •  Tyson  •  Will Waterson
Cabin Four
Demeter/Ceres Cabin: Alex Turner  •  Autumn Mori  •  Emma Müller  •  Katie Gardner  •  Melissa Craig  •  Sage Robert
Cabin Five
Ares/Mars Cabin: Amber Glade  •  Artec Wolf  •  Ash Wooden  •  Clarisse La Rue  •  Frank Zhang  •  Gen Liang  •  James Hook  •  Jeremiah Milas  •  Kathorine Hathaway  •  Kurando Hyuga  •  Kyle Hallowground  •  Olivia Hullen  •  Stacey Wolf
[v · e · ?]
Cabins 6-10
Cabin Six
Athena/Minerva Cabin: Amelia Conners  •  Annabeth Chase  •  Chloe Nash  •  Damien Vance  •  Jade Mariana  •  Malcolm  •  Raylene Alvis  •  Zoe Jackson
Cabin Seven
Apollo Cabin: Adam Greene  •  Cali Angel  •  Danny Wecht  •  Kayla Johnson  •  Lucy Daniels  •  Mackenzie Smith  •  Shirou Latorre  •  Theo Krane  •  Violet Painter  •  Will Solace  •  Wyn Dusan
Cabin Eight
Artemis/Diana Cabin: Zoe Nightshade
Cabin Nine
Hephaestus/Vulcan Cabin: Adalynn Francis  •  Alex Mace  •  Jaden Dustin  •  Charles Beckendorf  •  Leo Valdez  •  Kristen Wong  •  Joanne Dustin  •  Vivian Hua  •  Zack Reynolds
Cabin Ten
Aphrodite/Venus Cabin: Abby Rose  •  Alison Gregor  •  Carly Bello  •  Sealie Shade  •  Chad Smith  •  Chloe Bateman  •  Drew Tanaka  •  Emilia Rossi  •  Felicia Davis  •  Jamie Slay  •  Jessie Rose  •  Piper McLean  •  Sierra Rose
[v · e · ?]
Cabins 11-15
Cabin Eleven
Hermes/Mercury Cabin: Alla Yates  •  Anna Yates  •  Cameron Clarkes  •  Charlie Picket  •  Connor Stoll  •  Dorian Reed  •  Eric Klerkse  •  Issac Merchant  •  Jolon Edgecomb  •  Luke Castellan  •  Myka Carter  •  Peter Tachytita  •  Travis Stoll
Cabin Twelve
Dionysus/Bacchus Cabin: Cameron Pharaoh  •  Grant Williams  •  Ky Young
Cabin Thirteen
Hades/Pluto Cabin: Archie Craig  •  Audrey Hastings  •  Bee Santana  •  Bianca Di Angelo  •  Derrick Black  •  Dylan Shay  •  Hazel Levesque  •  Nico Di Angelo
Cabin Fourteen
Iris/Arcus Cabin: Harley Duff  •  Luz Rivera
Cabin Fifteen
Hypnos/Somnus Cabin: Richard Mustermann  •  Chase Arwight
[v · e · ?]
Cabins 16-20
Cabin Sixteen
Nemesis/Invidia Cabin: Alsanna Gwyndolin  •  Ethan Nakamura  •  Lemming Wrong  •  Olivia Elliot  •  Zeno Raymond
Cabin Seventeen
Nike/Victoria Cabin: Sophie Lynn
Cabin Eighteen
Hebe/Juventas Cabin: Nicola Yankovsky
Cabin Nineteen
Tyche/Fortuna Cabin: Jasmin Martinez
Cabin Twenty
Hecate/Trivia Cabin: Arkor Kurnel  •  Calliope González  •  Jellal Foster  •  Lou Ellen  •  Lucy Belle  •  Marcus Blackstone  •  Michiko Tsukino  •  Parker Provencher  •  Roxy Karma  •  Veronica Carter
[v · e · ?]
Cabins 21-25
Cabin Twenty-One
Persephone/Proserpine Cabin: Remy Armbruster  •  Rodi Classen
Cabin Twenty-Two
Erebus/Erebos Cabin: Liam Night  •  Nathan Mccoy  •  Reyna Umber  •  Summer Forest  •  Wyatt Mccoy
Cabin Twenty-Three
Deimos/Metus Cabin: Alma Mendez
Cabin Twenty-Four
Eris/Discordia Cabin: Chinatsu Himura  •  Lex Lexton  •  Rosie Stone
Cabin Twenty-Five
Khione/Chione Cabin: Layla Hunter
[v · e · ?]
Cabins 26-30
Cabin Twenty-Six
Circe Cabin: Drew Adler  •  Gage Pierzynski-Arvanitis  •  John Proctor
Cabin Twenty-Seven
Eros/Cupid Cabin: Ian Oaks  •  Nicole Carter  •  Quinn Oaks  •  Rowan Richardson  •  Scooter Tompkins
Cabin Twenty-Eight
Ananke Cabin: Kendall Gergan
Cabin Twenty-Nine
Lelantos Cabin: Rogue Hunter
Cabin Thirty
Odyne Cabin: Adriana Ramirez
[v · e · ?]
Cabins 31-35
Cabin Thirty-One
Lyssa/Ira Cabin: Allen Trask
Cabin Thirty-Two
Asteria Cabin: Ariana Solas
Cabin Thirty-Three
Harmonia/Concordia Cabin: Esme Webb  •  Kai Alekai
Cabin Thirty-Four
Metis Cabin: Calem Parker
Cabin Thirty-Five
Maia Cabin:
[v · e · ?]
Cabins 36-40
Cabin Thirty-Six
Peitha Cabin: Gwen Sperling  •  Itzel Villegas  •  Sirena McCall  •  Sol Sullivan
Cabin Thirty-Seven
Pheme Cabin: Cherry Valace
Cabin Thirty-Eight
Theia Cabin: Faith Trails  •  Silas Spectra
Cabin Thirty-Nine
Cybele Cabin: Leandra Orion
Cabin Forty
Harpocrates Cabin:
[v · e · ?]
Cabins 41-45
Cabin Forty-One
Mania Cabin: Elton White  •  Michael Slay
Cabin Forty-Two
Hemera Cabin: Pace Holton
Cabin Forty-Three
Perses Cabin:
Cabin Forty-Four
Adrestia Cabin: Eli Acacia
Cabin Forty-Five
Melione Cabin: Alessandra Nicholl  •  Isabel Castro
[v · e · ?]
Cabins 46-50
Cabin Forty-six
Phobetor Cabin: Ash Starr  •  Dusk Starr
Cabin Forty-seven
Jana Cabin: Hiruma Kido
Cabin Forty-eight
Thanatos Cabin: Jasper Adams
Cabin Forty-nine
Ate Cabin: Caden Moore
Cabin Fifty
Aether Cabin: Dawson Sky
[v · e · ?]
Cabins 51-55
Cabin Fifty-one
Aeon Cabin: Caelum Mars
Cabin Fifty-two
Lupa Cabin: Lauren Alexander
Cabin Fifty-three
Kympoleia Cabin: Tempest Wilder
Cabin Fifty-four
Eurus Cabin: Cairo Bonneville
Cabin Fifty-five
Astraea Cabin: Galena Carlyn
[v · e · ?]
Cabins 56-59
Cabin Fifty-six
Dolos Cabin: Ryder Tymek
Cabin Fifty-seven
Chronos Cabin: Flynn Aristok  •  Layla Aristok
Cabin Fifty-eight
Bia Cabin: Erin Evans
Cabin Fifty-nine
Chaos Cabin: Koda Snow
Unknown Cabins: Amhloaibh Song  •  Celia Sosa  •  Clayton Haggerty  •  Cynthia Reynes  •  Elliot Thompson  •  Harvey Reece  •  Luca Harrison  •  Madeline Ellis
[v · e · ?]
Roman Cohorts
Cohort One
Cohort 1:
Cohort Two
Cohort 2:
Cohort Three
Cohort 3:
Cohort Four
Cohort 4: Avaline Acacia
Cohort Five
Cohort 5:
[v · e · ?]
Mortals: Ashley Carter  •  Brian Kraft  •  Hope Evans  •  Jared Solas  •  Jayden Ashwood  •  Maximus Daniels  •  Riley Hennings