So, my character Kanami Yamamoto starts out as the cool but creepy cemetery worker of Walnut Grove Cemetery. Then, as she starts to warm up to the unnamed Protagonist, she becomes cheerful and lets them in on her secrets and personal stuff. She becomes obsessively in love with them and due to her loneliness and abandonment issues, kidnaps them. She keeps a cool/cheerful mask like everything is under control and even (fake) smiles when Protagonist leaves her.