Not really, I don't think it'll be too close. He's mostly going to use her like a couple of other anime characters I've seen. I'll have to find youtube links for them so I can give you guys an idea of how it'll work, but if anyone has heard of these, I'll describe them so people who know can get an idea sooner. Since he wears the fishing pole on his back like a giant staff/spear, he can have it shoot out its fishhook and grab things and then retract the line so it acts like a winch and lets him get up to high places quickly; this will be similar to how the winch device from the series Desert Punk works, if anyone has seen it. And for combat, he'll wield the fishing pole more like a whip or lashing weapon, similar to how Uraurashima from Yu Yu Hakusho fought Kurama. I'll try to find video links for those later.
So anything you can think of other than those should be just fine for a rope guy. I recommend using lasso moves in your repertoire and also having them move erratically like snakes to confuse the enemies and make their movements unpredictable.
Edit: I couldn't find any decent vids on youtube of either thing, dammit. I'll just try to describe it as best I can in writing when the RP stuff starts.