Companion (Doctor Who) "Face the Raven", but in a subsequent episode ("Hell Bent") her time stream is frozen at the moment of death by the Time Lords so that they can interrogate her about the Hybrid; the Doctor takes advantage of this to save her life, but she remains technically neither alive nor dead, does not age or have a pulse. After her departure as a companion of the Twelfth Doctor, she teams with the immortal Ashildr and travels in a stolen TARDIS. Other companions died in alternate timelines or alternate lives. "Brigade Leader" Alistair Lethbridge-Stewart, "Section Leader" Liz Shaw, and "Platoon Leader"
Crystal (comics) metals and electricity. Crystal was the first character to be identified as an Inhuman, and is one of the most prominent Inhuman characters. Crystal is a princess of the Inhuman Royal Family and sister of Medusa, Queen of the Inhumans. She often appears with her canine companion, Lockjaw. The character has regularly appeared as a main character in several comic book titles, including various incarnations of "Inhumans" as well as "Fantastic Four" and "Avengers". The character is unique in her affiliation with all three of these groups. She is also associated, to a lesser extent, with the X-Men due to