Sierra Tentacles, Squidward’s joyful yet shy younger sister, is his complete opposite—a sweet, optimistic soul who constantly tries to make him smile and see the bright side of life. Adoring SpongeBob, she matches his energy and charm, sharing hobbies like ukulele lessons and jellyfishing. As the cheerful janitor of the Krusty Krab, she often covers for Squidward on the register, spreading warmth wherever she goes. Reminiscent of Charlie from Hazbin Hotel, Sierra’s gentle kindness. 