I had a rookie, named Shopkeeper, after the guy with the same name from one of the Ultima games. Now, Shopkeeper was blessed by the RNG. He could walk through a hail of reaction fire with nary a scratch, and seemed to inspire idiodicy in all aliens around him, who routinely blew themselves up with grenades.
I took him with me to Cydonia, where he pretty much drew every single shot to him without suffer even one. Blaster bombs would veer off course, plasma shots would miss him by a mile, and grenades killed their owners constantly. And we went down.
Now, Cydonia splits up your team across the base, and Shopkeeper was left all by his lonesome. He went around a corner, and BAM, Cryssalid. On it's turn, it swung eight times, and missed every single one. The second Cryssalid, however, managed to hit him.
His Corpse retained the same luck he had in life, withstanding a grand total of three bolts from heavy plasma cannons before releasing it's xenomorphic passenger. He then proceeded to eat 4 heavy plasma rounds before dying.
And then something happened.
He got back up. But not as a Cryssalid. Oh no. Ohhhhhh noooooo. Some horribly glitched mass of static rose from the grave that day, and killed five good soldiers.
That's what I get for naming him in refrence to a Kikoskia video, where the same thing happened. The name Shopkeeper is now forever cursed in my eyes.