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The youngest of the mermaids; she is despised by all her older sisters except for Ariel. Seine thought she had killed her some 300 years before, but Ariel restored her body almost entirely, leaving her badly scarred about the neck and unable to talk, but with the ability to change herself to have legs and walk about on land. She was introduced as a new transfer student; and Tatsuya is given the assignment of teaching her sign language. Her true goal is infect a lot of people to order to take revenge on Seine for leaving her without her voice. She falls in love with Tatsuya.

Powers and Stats

Tier: 10-B

Name: Sheila

Origin: Hekikai no AiON

Gender: Female

Age: At least 330 years

Classification: Mermaid

Powers and Abilities: Immortality, Regeneration, Magic user, Telepathy, Empathy, Mind control

Attack Potency: Human level

Speed: Unknown

Lifting Strength: Human level

Striking Strength: Human Class

Durability: Human level

Stamina: Unknown

Range: Kilometers

Standard Equipment: Anna - A sea slug. Pretty smart (smarter than Sheila), can take control of people (one at a time), while the control is much stronger than with worms (a person's personality is completely suppressed and when control disappears, the victim thinks that she was sedated all the time) .

Intelligence: Average

Weaknesses: Unknown

Notable Attacks/Techniques:

  • Superhuman senses - Mermaids are able to feel everything that happens in the sea. In addition, they can learn about what is happening on the ground (but only on the coast).
  • Infection - using specific parasitic worms, mermaids can take control of humans. At the same time the human will be in constant telepathic communication with his mistress.
  • Telepathy - The ability to communicate with the consciousness of other living beings. Including a human consciousness.


Notable Victories:

Notable Losses:

Inconclusive Matches: