Note: I haven't even married Nil yet so I don't even know if it's possible for her kits to have horns, and if you have a different idea of if a cat is masculine or feminine chalk it up to it being an alternate universe from your game!
Cats not in game or maybe be randomly generated
Frog-kick-starter pelted tom with magenta eyes and webbed toes
Nyx- looks exactly like Nil, but with magenta eyes and spaces "missing" a little over half way up her tail (in terms of base to tail), toes from her back left paw, between her back and front shoulder/hip and the rest of her legs, and one just above her ankle on her front left paw. There's also one separating her let horn into three sections and her right one's tip from the rest of the horn and the tip of her left ear from the rest of her ear.
Toad: Small, all brown tom with webbed toes like his father and cherry eyes (reference to the fact that I originally had Frog colored brown before switching to Kickstater pelt when I got into the game)
Firefly- main green color from kick-starter pelt and cherry eyes with small horns on his head
Marigold-kick-starer colored Bengal with magenta eyes
"Nil!" Frog smiled as he brought her a frog to eat "How are they?" "They're fine Frog" Krampy, the Mystic Colony healer, reassured with a chuckle "The birth happened without a hitch...you have three sons and a lovely little daughter" Frog nodded and nuzzled Nil between her horns, but frowned "Our daughter...." he shrugged though, chalking it up to normal Mystic colony weirdness "Anyway they're so tiny..." he marveled at his tiny kits and Nil chuckled gently FRog laid down next to her and curled up around his family, for once the frog he had brought forgotten.
Nil stretched as she padded into her den. She was glad she finally was able to collect enough Catnip to start its area in her garden. Currently she was growing lavender, Valerian, and Golden-seal, and she had room for one more plant. She purred as she planted it and went over to her calderon. She had found it north of the graveyard where she now made her home. It was hard at first, leaving the Mystic Colony, but she wanted to help all of the colonies with her enchantments and potions. She only gave temporary boost though, and love potions were unethical, as she constantly had to explain to desperate cats coming to her for them. She loved the Arcane, and her natural abilities were a perfect starting point into her interest. She hummed and opened the weird human book on the Arcane she had found near the thundering path