There are worse trades you can make, like senses or body parts, but Kon likes humans.

[ Either way, Aki won't be around to see it!

Following after Bakugo is easy enough, Aki content to be led for now, especially if it means he can focus his attention on trying to find the right direction. If he can figure out anything that might help Tsurumaru then he'd be happy, he'd be content... That would be enough for him, for this journey. It's not as if he has other emotional connection to Kyoto.

Then the wall gives way, and Aki is turning, pressing his metal hand into the fragment and frowning, beginning to push.

He's still a little in lecture mode as he goes, though. ]

The trades make you more powerful, so it's worth it.