>>24853722It has no change on the info menu so I can't see any way to tell what it does.
Also, it seems that styles and puppets present in the base game have in fact received some changes, it's not just the new type and styles.
That ability on Momiji seems to be new, judging by the "HP 1/3" not being related to any of her original abilities, unless perhaps it's just fair & square that got reworked to change the health threshold on it.