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Moeru is a female High-level Dragon and the familiar of Bellerophon, who acquired her during his first trip through the Familiar forest.

Appearance
Moeru is a western Dragon with non-reflective jet-black scales, her sides having small light patches in a pattern similar to that of a manta ray. She possesses two extremely large wings that allow her to perform a vertical takeoff, with a smaller pair near the base of her tail that aid in gliding. At the end of her tail she has yet another set of wings that aid in steering and stabilizing.

Her eyes are a bright violet and are located very near the front of her face, giving her excellent depth perception and reflexes in flight. She can narrow her pupils to slits when threatened or angry, similarly to a cat, however whenever she's happy her pupils dilate.

She possesses spines on her head and forelegs, with three sets of extended spines running along her back that aid her in making tight turns.

When first introduced she was small enough to completely wrap around Bellerophon's shoulders, while centuries later she was large enough to allow Rias and Issei to ride on her back.

Personality
Although she repeatedly tried to kill Bellerophon, after she gets caught she becomes friendlier and more playful towards him, usually draping herself over his shoulders.

When she reached adulthood she has shown herself to be very intelligent and seems to have a dry sense of humor, despite being unable to talk.

She doesn't take kindly to being offended nor anyone offending or endangering Bellerophon but is usually playful and even a little teasing when not threatened. She shows a great sense of curiosity, imitating her master's actions and mannerisms.

She can display a bit of an attitude at times, reflecting her dry humor. She isn't easily intimidated and her daring bravado can get her into trouble at times, such as when she interacts with Ophis and Tiamat. She is also not above using violence to reach an end.

Powers & Abilities

 * Fire: Moeru is able to conjure several forms of fire, with her signature attack being dive-bombing and firing a precise and incredibly powerful blast.
 * Plasma: She was shown to produce extremely hot blasts that also carry an electrical charge, powerful enough to paralyze or even kill targets.
 * Shapeshifting: Moeru was shown capable of switching between her adult form and her diminutive one.
 * Stealth: She can move without producing noise, which makes her extremely good at scouting and infiltrating unnoticed.
 * Immense Agility: Her skeletal frame is extremely flexible and allows her to contort and change direction at a moments notice. Her aerial acrobatics allow her to escape with little difficulty and even when not flying she can tear along the ground at terrific speeds, being one of the most agile western dragons on land, shown being able to leap from trees, boulders, walls, etc.
 * Immense Speed: Moeru is easily capable of breaking the sound barrier when flying at her top speed.
 * Enhanced senses: Moeru appears to have an uncannily great sense of hearing, able to overhear a hushed discussion through the walls of a Church, to the point of using it like a sonar to navigate in the darkness.
 * Flight: As a Dragon, Moeru has the natural ability to fly with her wings.

Trivia

 * Moeru means "to burn", "to get fired up".