Starway is very sensitive and easy to upset. She has a very kind heart, but is often taken advantage of because of this. She has Underswap Sans' kind and naive personality getting her sensitive nature from him. She is also called a crybaby because of her sensitive nature. Starway also gets Underswap Sans' forgivable nature, always hoping that the worst person can change. Her love language is gift giving homemade things and her and her parents have a good relationship.