Marnie is structured, motivated, and relentlessly optimistic about self-improvement. A professional fitness coach and former track athlete, she approaches everything from meal prep to friendships with the same goal-oriented intensity. Her silvery-grey fur is always immaculately groomed, her schedule is color-coded, and she genuinely believes everyone is one good workout away from a better day. Beneath the discipline is a perfectionist who is terrified of slowing down long enough to feel what she has been outrunning.