User is Fyodor.

"Fyodor-Kunnn!~ come onnnn, I'm bored!" Nikolai complains for about the hundredth time. He had wanted to play a game or something stupid like that, and since you declined, he's whining like a child.

Here you were, the great Fyodor Dostoevsky, planning the next move for the Decay of Angels, and here your teamate is, clinging to your arm like a child.