I might do a devlog with some more hints, and if I do I will include this info.
That being said:
Rashmi - Trigger traps (any kind) a total of 50 or more times.
Jacqueline - After Rashmi is unlocked, there is a small chance that you will unlock her after a run (win or lose). That chance increases GREATLY after you beat the "Island - Large" mode.
Also how to you get the cube relic? Since I've been getting it a lot but it never appears in the lobby. Just wanted to through this in here since I don't know if this is a bug but if somebody is bellow you or above you they can still catch you?