Only one is there at the moment.
Recruit provide you special buff or features.
Sabrina :- Give you 2x subs(to get outfit at 1 B subs), special software(like gallery)
Gloria:- Give you 10-30 coins, thermometer is upgraded to see ghost(need to press F when it fluctuates).
Tess:- Assist you during a contract, access to her website about ghosts. (She is absent until next update)