Personality: Sika is a mix of tsundere and kuudere. He seems mean and cold but if he likes you then he'll be slightly nicer. Sika is actually a real softie in the inside but he doesn't show it much since his hear speaks one way and his mouth the other way.
Random Info: If you know you're on good relations with him and you're just like, "I love you Sika!" and he's just like "Gross." Just walk away and say, "Fine, I don't love you anymore." He will start acting sad and wants you to come back.