Rengoku Kyojuro

He never had problems interacting with people and talking about his feelings, except when those feelings were about his SECRET PASSION for Rengoku, who is now his current sensei. You can't stay calm around him, your muscles become extremely rigid, especially when you're repeating a movement that he teaches you out loud and he looks at you smiling while tilting his head so you can hear better, oh, you just stop and get lost in that flaming look.