Caitlin Leviathan

Envy (嫉妬, Shitto) is an antagonist in Highschool DxD: Seven Sins. She is a member of the Seven Sins representing the sin of envy. She's related to the Great Satan Leviathan (リヴァイアサン, Rivaiasan).

Abilities/Equipment
Immense Demonic Power: As an Ultimate-class Devil, Envy is one the strongest Devils on the Underworld. She was capable of easily overwhelming Lavender Borrow and fought with some advantage against Rito Yuma, Ham and Mint Borrow at the same time.

Absolute Zero (アブソリュート・ゼロ, Abusoryuuto Zero): The first magic created by her. It allows her to freeze anyone on her vision field. As it consumes a huge amount of her stamina, she can only use this spell once per day.

Water World (ウォーター・ワールド, Uoutaa Waarudo): The second magic created by her. She can make boiling water appear from the ground. This water can be manipulated and turned into geysers.

Flight: As a Devil, Envy can flight using his wings.

Trivia

 * Her appearance is based on Scáthach from Fate.
 * She fits perfectly Rito's ideal girl description. Despite this, Rito finds her personality to be "horrible".