Before the castle ambush, Gudako walks up to Makoto about what abilities Makoto just unleashed to her with the exception of the Noble Phantasm and his rune magic

"Makoto, when you fought Martha, I felt dizzy all of a sudden, it's like... I feel tired afterwards. And then before I went to sleep, I got a sudden headache. Can you tell me what happened and what did you do?"

Makoto was in shock after what she told him. Forgetting that there's a consequence if he ever goes all out

"I'm so sorry, Master, I got too carried away"

"It's okay, it's just... what happened?"

"Okay, umm..." He turns to her with a serious look on his face "You see, when I use 'that' and summoning my persona, I'm taking your mana and used it to go all out in battling my enemies"

"Oh, so that is why. And your sudden change during a fight with Martha-"

"A story for another time, Master. Just remember to stop me using your command seal in case I go all out"

"Yes, daddy"

"(Was that really necessary?)"