Persona affinity

[Fahrenheit]

I noticed some personas (Fafnir for example, which drains nuke). But as I evolve them, one of the skills is either absorb or null those particular elements. What is the point of having suck passive skills if the personas are already draining those elements? Do they stack? (Probably not) Do the personas still absorb the elements if I delete the passives? The game just doesn’t explain it

[MizarAce]

You can inherit those to other personas.

[Soulkey]

You can use that when you fuse them into personas and pass those passives.

[Arifufu]

The reason is to transfer it to other persona duh, if use that fafnir as one of your main persona at least u can put that drain nuke to other persona that u don't use, so u can transfer that "drain nuke" to other persona later.