Unknown (4 FP): Memories, information or interest relating to [character name] or their nature falls out of mind once out of sight. This effect does not stop creatures from retaining working memory while interacting with them, but will stop creatures from noticing their presence without direct interaction or remembering it afterwards. Creatures with minds immune to mental tampering are not affected by this Feature.

For 4 additional FP, they can choose to apply this Feature selectively, it only effecting creatures they choose when they choose.