[ Geez, as if Ishida wasn't already weird enough as it is, his past life somehow surpassed that. This made him have so many questions about the guy's past life. What even kind of world was he from? ]

Ha! Naturally. I wouldn't dare travel down the subways with someone incompetent. [ Which is basically his tsundere way of admitting that Ishida is a responsible person and that he trusts him. Despite the animosity on his part.

There's a slight pause before Leon turns around to give his rival a god honest... smile??? What is going on. ]

You can count on me to have your back as well. There's absolutely no way I'm letting something happen to my eternal rival. It wouldn't be the same if you weren't around.

[ The truth of the matter is, if something were to happen to his rival... he would be distressed. ]