It's a bit like that for us too! In a way it's thinking back to the first time we had to summon them...

[That's an interesting question, and his face turns a lot more serious. For some reason, this reminds him of a conversation he had with Eriko a short while after their awakening...]

It's...much like summoning any persona. You feel full of power, almighty and powerful...a liberating feeling that comes with the use of it. In a way it's looking into different aspects of yourself, like Philemon told us at the time...