Tricycle Cat. You get him by getting thirty Daily Login stamps when you first start playing The Battle Cats.
The thing is, I only started playing Battle Cats this month. So I haven't yet unlocked Tricycle Cat. And now, every time I get a login stamp, it reminds me, "X more days until you unlock Tricycle Cat!"

You don't understand. Just, this absurd little gacha game where almost every unit has this
exact stupid face, has a daily login bonus campaign that is going to last longer than we can post on cohost. I just. I can't.