Yes, if she has two Spirits bound, then she can attack 3 times.
The terms area-attack and multi-attack got a bit conflated during development, it's true.
For bosses, here are the basics:
- They can attack multiple times under the right conditions.
- Their attacks almost always hit everyone within range, the notable exception being the Twilight Magdelina boss.
Udstad's Cannon attack has the distinction of being single-targeted instead of an area attack. When I said "Runika would deal them 8 damage", "them" is being used as a gender-neutral singular pronoun. We are still talking about only one individual taking the damage.
Helps a lot!! Thank you very much!! And I am looking forward to trial of indines!!