User:

Name: Pantherwish/Pantherstar- (I had an OC named Pantherface...I'm not sure which is worse...the 'wish' suffix definitely deserves an explanation...)- 1 point

Age: 29 moons

Appearance: a sleek black cat with bright yellow eyes and quite large claws- (Makes sense. Nothing wrong with a black cat, although a black cat with yellow eyes is pretty common.)

Gender: she cat

Sexuality: pan- (...)

Personality: she's more on the cold side. She's really only nice to people she knows well and is comfortable with. She's basically mute or snappy and rude to cats she doesn't know. Nothing caused her to be this way, it's just how she is.- (No problem with that. She sounds like a ShadowClan cat.)

Rank: warrior-deputy-leader

Clan: CedarClan- (Good Clan name.)

Likes: to be alone, fighting, speaking to Goldenpool, stargazing

Dislikes: cats she doesn't know, cold, kits slightly, her father- (Okay...)

Family-

Mother: Lionear- a large fluffy light blonde she cat with Amber eyes. She has white under her belly and paws- (Blonde? Not sure that's possible...yellow, maybe?)

Brother- Goldenpool- a medium length furred Tom with white paws and green eyes

Sister- MudClaw- a dark brown she cat with a white belly and muzzle. Her ears are a bit small like her mother's- (Mudclaw is cannon.)- 1 point

Father: an unknown rogue

Cause of death: a badger had sliced her throat up. Causing blood loss and all her lives- (That was quick.)

Other: she had a prophecy to fulfill for her clan- (Not much explanation here.)- 1 point

No backstory- 5 points (which I'm sure you expected...)

Points Taken: 8

Results: 92%

Honestly, this OC is not as bad as I expected. She could use a slight name change (a common mistake) and maybe a little bit of change in her appearance if you want her to stand out. Mudclaw is cannon, as you now know, and you didn't give me any backstory. Nothing wrong with the OC, just the way you told the story at the time.  I'm pretty sure all Warriors fans had that cringy OC at one time, and this is kind of in between cringy and good.