Sorry but not really. Only grammar betas and proofreaders restrict themselves to nothing but grammar and spell checking. That's why the beta thread has listings for things like comprehensive beta readers, plot beta readers, and so forth. I mean, you are requesting a character beta reader, which in itself isn't checking over grammar and spelling but is instead looking particularly at character development. Character beta readers would then need to be able to comment on plot because everything that happens in a fic relates to how the cast acts. Not to mention we've given you advice about characterization in a past thread, and you didn't want to take it. So... yeah, asking for a character beta but then not really being open to characterization advice in public isn't a good sign for potential betas.
The first post of the Beta Place should be able to give you a good idea of what kinds of beta readers are out there and which ones to ask for. I'd suggest taking a very close look at which one you want and directly asking one of the betas who specifically advertise themselves as betas for the areas with which you need help. Alternatively, seek out reviewers who seem to be good in grammar and ask them if they would also function as your grammatical beta reader. In any case, be careful with what you're asking because there's really different types of betas. (And most betas tend to be comprehensive, meaning they'll point out a little bit of everything if they feel the need to do so. Betas are basically reviewers before you post your work, so there's no reason why they'd restrict themselves to only one field.)
Moreover, the point is that if betas get the idea that you might not be receptive towards them, they'll be less likely to take you as a client, no matter what kind of beta they are. I'm a grammatical beta myself, and to be honest, the point I was making in that second paragraph of my other VM still stands for me.
The first post of the Beta Place should be able to give you a good idea of what kinds of beta readers are out there and which ones to ask for. I'd suggest taking a very close look at which one you want and directly asking one of the betas who specifically advertise themselves as betas for the areas with which you need help. Alternatively, seek out reviewers who seem to be good in grammar and ask them if they would also function as your grammatical beta reader. In any case, be careful with what you're asking because there's really different types of betas. (And most betas tend to be comprehensive, meaning they'll point out a little bit of everything if they feel the need to do so. Betas are basically reviewers before you post your work, so there's no reason why they'd restrict themselves to only one field.)
Moreover, the point is that if betas get the idea that you might not be receptive towards them, they'll be less likely to take you as a client, no matter what kind of beta they are. I'm a grammatical beta myself, and to be honest, the point I was making in that second paragraph of my other VM still stands for me.