Gretchen article name

So, here's something that's been bothering me for a while. Why is the page for Gretchen titled "Gretchen (Character)"? That is an oddly specific add-on, given that there's no other pages sharing Gretchen's name, and no other characters have that subtitle on their page, so why should hers?

Basically, what I'm asking is, is there a way to change article titles? Because if there is, we should do so to remove the (Character) bit.