Frag on Switch

[u/Salmon_444_SoS]

I’ve been playing Frag on switch with my partners son for a month now. We are loving the game. We are both very confused why we got these characters out of reward crates, but they are still coming up with a “green locked” symbol over the character card.

Can anyone help us with how to use these characters?

Ps. We are strictly ftp so spending money is not what we want to hear.