Rolf is actually being compared to Titania? LOL. Wow, not even close
Titania, 20/20 A Mist B Boyd (Forged Silver Axe)
HP 48.2
Atk 43.5
Spd 23.5*
Def 22.6 (+2)
Res 19.6 (+2)
Rolf, 20/20 A Mist B Marcia (Forged Silver Bow)
HP 43.8
Atk 42.7
Spd 26.2
Def 21.4
Res 15.5
Rolf has a bit more speed, but not really because Titania is pretty much doubling everything anyway, and can get a few Knight Ward levels to get up to, say, 25 speed pretty easily.
Otherwise, Titania has more attack, more durability (def/res/HP), more mobility (2 move and move-again), can gain weapon triangle advantage over two types of foes, can attack at 1 range or 1-2 range (instead of just pure 2 range).
Titania is clearly superior to Rolf at 20/20. Now consider that Titania hits 20/20 way earlier than Rolf (in fact Rolf might not even hit it at all), so at any point before endgame the gap becomes huge. I don't need to bring up how the comparison looks in Chapter 9, I hope.