Name Koisplash. Very interesting name! I've only seen Koi used once in an OC.

Past Names: Koikit, Koipaw. Normal.

Clan: CaveClan (Fan-Clan) Cool, I like FanClans. They add an interesting element to the story.

Past Clans: None. Okay, loyal cat.

Gender: She-cat. Nice.

Sexuality: Straight. Okay!

Appearance: A somewhat stocky and ridiculously fluffy calico, with fiery, sunset-orange eyes. She has a petite pink nose, pink paw pads, and large ears. She's average-sized and has a long, bushy orange tail with a white tip. Her front right paw is black, as is her back left paw. She has black fur covering the left side of her face, orange fur covering the right side of her face, and a white chin. She has a scar behind her left ear, which is usually relatively unnoticeable. On her forehead, she has sky-blue lightning bolt-shaped markings, given to her from StarClan, as all apprentices in CaveClan get markings once they become a Warrior or full Medicine Cat. Okay, I like her appearance, very detailed and sounds like a pretty cat, but I personally don't like the added marking. The fact that it is bright blue adds to the confusion. You don't have to change it, but personally, I would at least change it to a different colour, maybe ginger or black, or just take it away altogether. A blaze of black or an extended patch might fir better! Also, she sounds more like a Tortoiseshell, but you just might not have mentioned the white on her.

Personality: Confident and curious, while also being quite playful and adventurous. She rarely listens to common sense, instead striding to follow what her heart says. She's very aware of what's going on around the room, although she never really knows how to effectively use that knowledge. She's a jokester, always lightening the mood, and resembles a somewhat sisterly vibe to everyone. However, she's also extremely cocky and stubborn, refusing to do things with large sacrifices. She is sarcastic when annoyed, and impatient. She is loyal to her family and friends above all. Pretty balanced and fair! A good set of good, and bad traits.

Mate: Kitescratch (The canon SkyClan Warrior) So they live near the Five Clans?

Kits: None. Okay.

Other Family and Kin: Brother- Eaglestar, formerly Eagletail, a very large brown tom with a white head and tail, and yellow highlights on his cheeks and tail (Deceased, lost all nine lives in a battle, murdered by Stormcaller). Sister- Curlfall, a light tabby she-cat with quiet lavender curls encircling her pelt (Alive, mates with the she-cat Dawnfur). Father- Flamewind, a cream tom, with deep blue eyes and bright red wisp-like markings encircling his body. Mother- Pondleap, a silvery blue she-cat with light green eyes and bright, foamy white markings on her underbelly, bottom of her sides, paws, and tail. Detailed! I like their appearances. But how would a cream and 'red' (I would recommend dulling it to ginger, as red is not a colour cats can have)  And a silver and white cat have a calico kit? 

Cause of Death or Future Death: (Future!) Koisplash, as a senior Warrior, saves an apprentice from the river and ends up drowning after getting the apprentice to land. Noble, but a bit cliche. 

 Rank (at death): Senior Warrior. Cool.

Past Ranks: Kit, Apprentice, Warrior (mainly Warrior for the story) Alright!

Good traits: Loving and playful, adventurous and loyal, brave and curious.

 Bad traits: Disobedient, incredibly stubborn, cocky, sarcastic when annoyed. 

Balanced for both! 

Hunting: 7.5/10

Fighting: 8/10

Swimming: 3/10

Climbing: 7/10

Leadership Skills: 4/10

Reputation: 6.5/10

Again, quite balanced!

Likes: Her family and friends, adventures, watching the sunset, and forests, taking a run through a misty morning. Fair.

Dislikes: Water, Stormcaller, Curlfall (formerly), a messy pelt, voles. Pretty normal things to dislike.

 Scars/Injuries: Has a small scar behind her right ear, barely visible, from Stormcaller. Mentally healing from watching her brother lose all nine lives in battle. I like the addition of mental healing from trauma. I all too often see a cat that loses its entire family, and children, and then two moons later are completely fine. 

Backstory: Koikit was an adventurous little puffball with no sense of danger, and on one of her brave little adventures, she and her friend/crush, Fluffkit, travelled too close to the river. Fluffkit fell in from the slick stone around the water and ultimately drowned. Deeply saddened, she found comfort in the elders, as they could comfort her and tell her interesting stories of the five clans, their ancestors, and Cavestar. Her brother, Eaglekit, protected her as best as he could, acting like a little leader, while Curlkit preferred to sleep all day. As an apprentice, Koipaw grew up a bit, learning to control her eagerness to explore, and creating an inseparable bond between her and her mentor, Sootfeather. In her apprenticeship, she finally kindled a sibling relationship with Curlpaw, as they saw past the other's flaws and loved the cat deep down. She also met Dawnpaw, the medicine cat apprentice, and they clicked into a quick friendship that lasted a lifetime. Poor Fluffkit! I like that she managed to build a bond with her sister and not just instantly like her. 

Once she became a warrior and gained her markings, Koisplash never got to live a normal warrior's life at first. Soon after her warrior ceremony, an earthquake shook the caves, which ended up making the cliffs collapse, and killing a handful of cats. She was sent to find the five clans and eventually did after a very long journey. Taken prisoner by SkyClan at first, she desperately tried to explain her predicament, but nobody would listen until the next gathering when she managed to stop Kitescratch from leaving and explain the issue. Soon, after they talked to Leafstar, she had Kitescratch accompany Koisplash back to her Clan. They arrived after another long trip and discovered that while she was gone, Eagletail had trained an apprentice and had become the new deputy, after the old one had retired. They brought the clan to settle in the mountains closer to the five clans, where StarClan had carved out a new home for them on a cliff. Near the end of the journey, Shiningstar passed away from the cold, making Eaglestar a leader. Kitescratch went back to SkyClan, and reached an understanding with Leafstar, asking to live in CaveClan after finding himself crushing on Koisplash. She agreed, and not long after Koisplash and Kitescratch were mates. Why did she need to find them? Were they in desperate need of herbs, space, or warriors? And now I get how she has a relationship with a cannon cat, but personally, I don't like cannonXoc relationships, but that's just me. Also, switching Clans for a crush is pretty extreme, you could flesh it out a bit more. 

The Clan was attacked a little while later by Stormcaller and his group of wild cats, intending to wipe out CaveClan to finish what he started so many generations ago, back when Cavestar was alive. Stormcaller had revived his body, so he was no longer a spirit, allowing him to do as he wished more effectively. He went into a battle and ended up killing Eaglestar by ripping his insides out, destroying all nine lives in the process. Koisplash, utterly shocked and in rage, leaped onto Stormcaller and snapped his neck. The wild cats retreated with their leader dead, and Eaglestar's deputy, Strikepelt, became Strikestar. The Clan settled down, and Koisplash learned to cope with her dear brother's death. She continued to serve her clan to the best of her ability. Is Stormcaller a Clan cat with wild buddies, or a wild cat with a Clan name? And the whole 'lose 9 lives by having insides ripped out' gives me major Tigerstar the first vibes, you could add some more details and make it more unique. But I like how she learned to deal with the grief.

Other: When Koisplash was a kit, she caught her first "prey", which was a beetle. Everybody refused to eat it. Also, the apprentice she saved was named Fluffpaw, after her deceased from kittenhood. Aww, both are cute extras.

Okay! I like Koisplash in concept, she has a great personality and good design (besides the blue lightning) But her backstory has a few plot holes. She is quite well fleshed out, and with minor adjustments, could make a near-perfect OC (if one even exists lol) Overall, I give Koisplash an 8.2/10. Thank you so much for submitting her!

Bonus: What I think she looks like:

(Just pretend both her eyes are amber/sunset lol)