Surprisingly as it is, in FFXIV lore Y'shtola is not a WHM, only a CNJ yet she uses Holy in Dissidia. It's confusing but oh well just gotta go with it.
I should mention that her attacks aren't the only ones to inflict status ailments. Other characters also have ailments, some probably more than others.
Bioga seems to be usable by multiple other characters. Her protection skill that recovers BRV (AND POSSIBLY BUT WE DONT KNOW) protects from attacks is actually Aetherflow/Ether Pulse apparently.