Lioneye! She is Puddleshine's sister, Daughter to Pinenose and Spikefur Sister to Birchbark and Slatefur. Her mentor was Snowbird until she gets sick with Yellowcough, and then it is briefly Tigerheart until he leaves Shadowclan when the Kin take over. She is one of the unruly apprentices that welcome Darktail's reign. As a paw she doesn't speak a ton, notable scenes she is in are when Twigpaw is captured during the yellowcough sickness Lion and Birchpaw fight over a scrap of prey using claws and drawing blood while the rest of Shadowclan ignores them and Twigpaw is appalled. Scorchfur simply says they started the fight and they could end it. She is well loved by her mother but doesn't seem to return that super strongly, Pinenose calls for her kits when she is sick with yellowcough and Lioneye is seen near her as she recovers but is turned away by her father and doesn't put up much of a fight. Puddleshine is there and Lioneye makes a comment about wishing he had told her and Birchbark that he had gone to collect the lungwort to heal her that Violetpaw thinks sounds envious.
Beyond that she's mostly on patrol or off page. She isn't particularly rebellious but she does want to do important things, sometimes seeming disappointed if willing to do menial apprentice tasks. In Shattered Sky Violetpaw says Lioneye Birchbark and Mistcloud left the kin and Darktail seemed dissappointed, but that she didn't know where they went. It's later revealed that they were murdered by Darktail in the lake, as they appear with the lost spirits. She is presumably in starclan.
As far as her design goes, I designed her as if Spikefur was not her dad because I didn't want to make her tortishell, to preserve the lion like look. I don't have a good contemporary alternative since the rest of shadowclans toms at the time are brown, black, or grey, or too young. Maybe Pinenose had a fling with a red kittypet and got a yellow daughter, idk.