Because it was only natural this would follow

[Lagunamov]

Seeing as Animositas can already steal memories, it is only fitting that that is not the only thing it can steal.

[Shadow Moonlighter]
An ability entirely dependant on the use of Shadow Façade on fallen enemies. Any fallen creature that has had its memories stolen and sampled by the Sentiment also has a set ob abilities permanently learned by it. Not everything can be learnt from the victim, same as with his or her memories, however. The learning capacity of this is limited by one Strong ability, one Moderate and one Weak, or three Weak abilities per person sampled, with a maximum of five amongst all those the Sentiment may have stolen memories from. If the limit is reached and a new one wants to be added, an older one needs to be forgotten permanently.
Because Animositas is only a carrier, and not the original owner of the abilities, none of them can be upgraded.

Range: Self
Speed: -
Cooldown:
Uses: Passive.
Strength: Strong

[Aerith]

Considering that you have this at Strong from the get-go, I see no problems with this. Also considering that playable characters dying are so few and far between (except in my case, apparently) and considering that Ani may not always be around if/when playable characters die, I don't see Ani abusing this to get five Strong abilities for cheap.

That said, I do have one question that I just thought to ask. If these absorbed abilities are at Weak or Moderate, would they stay that way forever, or would you be able to upgrade them yourself? I might go with no upgrading, since Ani got them from another person. Like the way it is with memories, she's just a carrier and can't actually change the memories, right?

EDIT: Thanks to those edits, I will accept this now~

Accepted, Locked, and Munny Deducted!

[Lagunamov]

No upgrading due to that carrier thing. It's been added to the ability description, alongside that if the limit is reached, an ability must be forgotten to put a new one in. Not that I think the limit will EVER be reached, but just to be safe.