Takeo: Most of the time, you have to initiate the kiss because of his shyness. He'll usually kiss you on the forehead when you don't kiss him.
Nikolai: Nikolai give great big kisses, often placing smaller kisses on your nose before kissing you again.
Dempsey: Oh boy! Dempsey kisses you passionately every chance he gets. When not kissing your lips, he kisses all over his face so he can hear you giggle from the cuteness and the fact it tickles.
Richtofen: He doesn't always like showing pda, but LOVES kissing your lips when you're alone. He'll also kiss your injuries after he's bandaged them.