I'm thinking it might be support or semi support.
The Robins just don't have the stats to be a very strong fighter, so I hope they can become good by helping others.
That'd be fantastic.
Would mind the close counter to have a condition like needing to be next to an ally. And for that to then give a spur effect to their ally.
I'd be down with a raven tome with maybe a CC bond for the refine. Given that Saber got a conditional DC refine, I feel it's a lot more likely than I would have thought before.
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes