Each of these terms has attested meanings that vary between fictional universes. For instance, if keyboard is possible to the past then it may be as only an observer who cannot interact, or as an actor but with a self-consistent and immutable timeline, or with consequences depending on history's sensitivity to change.
English
angel
blue
centaur
death, demon, dragon
electricity, elf, evolution
fairy
ghost, giant, god
human
immortal
kiss
love
mermaid, monster, moon, mutant
radiation
sex, soul, stone
time travel
vampire
werewolf, witch
zombie