Day-2 noob trying co-op mode - Snowbreak: Containment Zone

I've been trying some games recently, and found this one few days ago.
It's a decent game, but the game has gatcha stuff - one of the few downside I see.
I had to do intense re-roll for few days - I finally got Katya, the newest Waifu in this game.
I mean, it has Waifus with guns, so... u know. (I yelled 'I will take your entire stock!')
Ironically, it's from the same developer making Mecha Break - which is not released yet.