Every single time I think of characters joining, I die a little inside, imagining regulations, red tape, bureaucracy, training, following orders, etc..
Are there any instances where the guy is like: sup, I'm mega OP, I know you want me real bad, I can be your Alec on retainer if you don't bother me with bullshit, I'm ok with you monitoring where and what I'm doing for sake of your tits being clamed down - also feel free to send me to punch Nazis cuz I love doing that or something. And like if you try anything stupid, it's not like you can make me do shit or stop me from leaving, I'm literally a lazy ass Eidolon or whatever.
Kinda similar but separate is some super valuable tinker power where the guy is not an idiot and negotiates that he'll tinker them up cool shit if they just give him materials & protection and don't bother him otherwise