How much "older" are we talking here, out of curiosity?
I have
Alec as an option, but he's got a good few decades on Merletta (and is mostly a background character, if I'm being honest). I also have
Budonoki, who'd be more suitable (
but hasn't been accepted just yet was just accepted).
If you're willing to bring on a hired gun then
Micah would be a good choice, though I should mention he's... morally ambiguous in his
best moments. Interestingly enough, he has a smoke Semblance very similar to Merletta's -- that alone suggests these two would have an interesting dynamic.
Cordell, while a bit on the younger end (at least compared to Merletta), is significantly more trustworthy
and comes with a badass airship to boot!
Lemme know who you think is best suited and I'll jump into the mix with this.