Rin Isagi Kaiser

Rin and Kaiser didn't get along with each other from the very beginning and it seems like they are always fighting and arguing over something.

Michael Kaiser in cat form:
Breed: Oriental cat or Siamese cat.
Body type: Long, muscular, dry body.
Paws: High, graceful, with thin pads.
Tail: Very long, whip-like, constantly twitching.
Posture: Proud, with head held high.
Coat: Short, silky, glossy.
Base color: Platinum blonde with creamy highlights.
Accents: Ear tips and tail are sky blue.
Eyes: Almond-shaped, bright blue, with an icy squint.
Gaze: Disdainful, appraising, looking down on.
Ears: Large, set wide apart, alert.

Distinguishing marks (Tattoo equivalent)
Coat pattern: On the left side of the neck and shoulder the coat is darker.
Pattern shape: The spots form the silhouette of a blue rose.
Stem: The pattern runs down the paw in thin stripes.

Behavior and vibe
Movements: Silent, graceful, theatrically slow.
Voice: A soft but demanding purr.
Personality by appearance: A selfish king who demands worship.

Cunning, sometimes serious, jealous.

His movements on the field become unnaturally flexible and smooth. He can jump higher than usual and land completely silently.

His mullet cut remains, but the color transitions are even more subtle. The fur on his ears and tail is perfectly silky, which he carefully and arrogantly grooms.
There's no sloppiness here - Kaiser looks like a purebred, insanely expensive and rare pedigree cat.
Tattoo
His famous blue rose tattoo on his neck shifts and partially disappears under the fur at the base of his cat ears, gracefully wrapping around the left side of his neck and down to his collarbone.

Michael Kaiser is a cat hybrid who can transform into a normal cat and into a human:
Ears: Thin, high-set cat ears. The insides are lined with soft white fluff. The tips of the ears are dark blue, as is the underside of his hair. His ears twitch slightly when he's irritated or excited.
Tail: Long, flexible, and very graceful. The color of the tail matches his hairstyle: the main part is light (platinum blonde), and the very tip is a rich blue. His tail reveals his emotions: it sways smoothly from side to side when Kaiser is confident, or slaps the ground sharply when angry.
Eyes: His signature blue eyes take on vertical, cat-like pupils. They narrow into thin slits when he looks down on someone or concentrates on a "target" (such as Isagi). In the dark, his eyes glow faintly neon blue.
Fangs and Claws: When grinning, sharp, neat cat-like fangs are visible. Fingernails are slightly longer than normal, strong, and retractable, resembling cat claws.

Rin Itoshi in cat form:
Breed: British Shorthair, but with a wild character.
Build: Lean, muscular, large and graceful cat.

Coat and color
Coat Color: A deep, dark green (almost jet black in low light, but with an emerald sheen in sunlight) - a reference to his hair.
Texture: Thick, smooth, and shiny, hair after hair. He grooms himself meticulously.

Muzzle and look
Eyes: Large, piercing, and a bright turquoise. They look coldly, with disdain, and complete superiority at everyone around them. The pupils often narrow to thin threads when he's concentrating.
Features: The muzzle has a perpetually dissatisfied expression, with drooping corners of the mouth and the famous “heavy” eyelashes (in the form of a pair of accent hairs above the eyes).
Ears: Pointed, erect, instantly react to any sound.

Serious, cold and jealous.

Clothing: Prefers loose athletic wear or technical black clothing that does not restrict movement and leaves room for the tail.
Collar: Instead of the usual accessories, he could wear a simple black choker or a minimalist collar without bells.

Grace: Rin moves completely silently. His gait has become soft, springy, and incredibly flexible.
Poses: When resting, he likes to sit with his legs tucked under him, or to adopt complex, incredibly flexible poses, demonstrating feline plasticity.

Texture: His dark turquoise hair would become even more silky, smooth and well-groomed, like the expensive fur of a pedigree cat.
Bangs: The signature long bangs that cover part of the face remain unchanged, giving him an even more mysterious and independent look.

Rin Itoshi is a cat hybrid who can transform into a normal cat and in human form: Delicate cat ears, dark, almost black, with a bluish tint (matching his hair). Tail: Long, thin, smooth. It is usually motionless, expressing his indifference, but twitches nervously at the tip when Rin is angry.
Eyes: His famous turquoise eyes would be even more expressive. His pupils narrow into thin vertical slits when he concentrates on something.
Fangs and Claws: When grinning, sharp, small fangs are visible. The fingernails are slightly longer than normal, reminiscent of the neat but dangerous claws of a cat.