Selphina 3/10
She gets a 3 because she is a bow user when you've already got 4 others -- three of them are better than her in various ways, her durability is terrible because of her poor HP / DEF base+growths and because of how Charge works in this game, and is outclassed by Robert - A bow user who joins that same chapter. Her saving grace is that she provides very useful items that you would not be able to obtain without her. But the OP has forbidden such things to affect ratings. Either way, I would not use her under normal circumstances.
+ She gets you some rather nice items for other units. Elite Sword is pretty much mandatory for powerleveling Carion.
+ Being a mounted unit in this game is handy, since she usually won't be doing any major fighting she can do other tasks like item fetching.
± Her Charge skill and decent speed base+growths allows her to attack enemies several times per turn, but with a PCC of 1, and poor strength bases+growths, she usually doesn't kill anything of importance without her Killer Bow – which slows her down.
± She supports many units; unfortunately, most of them are not worth using.
- Her base 5 build means she loses Attack Speed and Avoid from any bow she can equip, The Killer Bow she comes with has 9 WGT, which pretty much makes her base 10 speed effectively 6. Her +15% BLD growth makes this virtually unfixable due to the low rate and the fierce competition for the Neir scroll.
- The Charge skill also works against her since it often causes her to get attacked multiple times by a single attacker, and with her poor durability, it can often be quite fatal; getting targeted by a Ballista is pretty much a death sentence for her.
- Being a (fragile) Mono-bow user ultimately means limited enemy-phase contributions.
- Robert joins the same chapter as Selphina and has similar base stats to her, but he also has far better stat growths than her. He also has 3 PCC to her 1 PCC which makes him a better user of the Killer Bow. And by the time he can equip it, his stats will have long eclipsed Selphina's.