I imagine if Onesie and Ace traveled together, it would go something like this
“Hey, Gramps!”
“My dear young lady, how many more times must I remind you to not refer to me as gramps!”
“Sorry, Profes-”
“Or Professor! What was it you wanted?”
[explosion in the background]
“Oh my-”
“Ace shot, Professor!”
“Oh, thank you, my dear. You know, I think I’m starting to get the- eh, the hang of this Nitro stuff of yours! Yes, yes, it’s quite enjoyable, actually!”
[explosions in the background]
“Oh no, they’re at it again!”
Don’t worry, Susan. Ace is just bonding with her future grandfather-in-law.