Name: Leanne
Nickname: Leo, Lionheart
Age: 13
Gender: Female (Gender fluid)
Species: Fish monster (like Undyne)
Looks: (same 'skin' tone as Undyne), sharp teeth, blond hair with black outlines, wears pigtails, purple shirt, black leggings, purple boots, purple eyes

Likes: The color purple, drawing, helping Undyne and Alphys with cleaning so she can save Undyne some time to watch Anime with Alphys, Anime (like Blue Exorcist), playing certain kinds of games

Dislikes: Bullies, abuse

Crush: None since she considers herself not old enough to have a boyfriend

Personality: Outgoing, social butterfly, kind, protective, courageous

Relationships: Shadow (friend), Undyne (Parent), Alphys (Parent), the skeleton brothers (Friends), Chara (enemy)

Size: 3 inches taller than Shadow (but still short)