Adult! Damian would be a great workout partner.
I mean it would suck because he wouldn't cave to any whining or poor excuses. He can tell when you actually need a break and when you're just being lazy or unmotivated.
He'd make you do the exercises properly with proper form and pacing every time. No half pushups or poor technique tolerated. Stretching is serious and so his hydration. He'd be a hard ass about it as always but his unwavering belief in your ability to actually do the exercise would be great motivation. He knows a lot more about this stuff than you do so if he's telling you that you can do a few more pushups or a heavier weight then it must be true.
He would also know just how to relieve the ache in your growing muscles. He had to deal with excessive body and muscle pain growing up so he knows exactly which pressure points to press and how hard. Honestly, the aftercare massages might be the biggest motivator and he probably knows that.
