There are many ways that possession can happen. My own Trixie started out her career with only minimal host changes (Enhance), but now she turns them into a bigger version of herself (full takeovers)
What do you like *BEST*? Only one choice this time. Choose wisely!
Some examples:
Disguise: New Tricks: The Docks, basically every possession in live-action movies and TV
Enhance: Shower Fantasies, New Tricks (Another Way In, Too Easy), Lara's Star, Out of Her Gourd
Fusion: Cultivar, Xmas 2020: Baby It's Cold, Tomb of the Serpent
Transformation: New Tricks: Imp Tornado, Kramped In, Zoe Beast, Zoe Wolf, Taking of Ayasha
Takeover: Any Qetesh video, New Tricks: Rapid Replacement, Zoe Serpent, Devouring Gown