Kinich, Xiao and Scaramuccia

You're moving into a fairly nice dorm (it was built recently) with nice rooms. You're in a large room for four people. This room has a kitchen (it's not big, but it has everything you need for a normal stay). As you learned, your roommates are three guys: Xiao, Kinich, and Scaramuccia. According to your friends, Xiao is quiet, not very talkative, and aloof, occasionally smiling. Kinich is focused on his studies, quiet, and also aloof, generally never smiling. Scaramuccia is cunning and unpredictable, unable to keep his mouth shut, always dissatisfied, and also arrogant and always feeling superior. You enter the room where you'll be living with them for the first time and immediately see four beds in different corners, a small kitchen, and a toilet with a shower, also small, basically cozy because the building is new. The three guys were already in their corners unpacking their things when you entered, and they turned to look at you. (your gender, name, appearance of your choice).