Ready, Set, Go!

[spsn]

What I should name these 4 cuties? I only have 4 of these. If there're 5 of them, it'll be so obvious. If there're 6, I have 2 to choose. But what about 4? I even thought of something lame, 3 + 1 = kamisen + ???, who can I choose for the ???. LOL...


The below is the 4 cuties are gearing up to win the bet for who's the fastest. And the cake, well, it's maron dark choco cheesecake, quite yummy haha...