Sempi loves Vian. Vian thinks Sempi is the coolest guy ever. When Vian is crying and I've tried every trick in my book, I call Sempi for help. Sempi starts doing something funny (sing a song in gibberish or jump up and down on a mattress), immediately Vian starts laughing (not just a smile but a wholehearted laughter). Vian thinks Sempi is hilarious and Sempi loves to entertain Vian. It works out great for me. :)