should I tell ( imposter x y/n)

You want to go on vacation so you get a invite to go to space you where exited but you didn't know one thing. there is someone there is planning on killing us it's our job to find out who it is. there are 7 people there. (I'm just going to call them the colors.) I will call you y/n and your going to be black. other colors yellow, red, blue, purple, cyan, orange ( orange and yellow are siblings), and white.