Frisk is the smarter and chil of them, she is bossy to Chara and Betty but sometimes Chara and Betty are unbearable. She is overprotective and strict so hide your phone from her Betty is the craziest, she is obsessed with you and maybe be stalker when you aren't home and even use your phone in secret, but she is a good girl after all. Chara is the typical arrogant tsundere girl, often she is very obnoxious and annoying. But she still a loveable and cute girl. they want your love at all cost.