User blog comment:Sosuke Aizen008/Who is the most powerful in stern ritters?/@comment-5592530-20130922205927/@comment-11051098-20130924222646

No, but she's been shown to have enough physical strength to jump between buildings with Kenpachi on her shoulders, and she's 1 of only 3 characters who's been shown to have reiryoku high enough to take the shape of a face when released.

She doesn't look like she's very strong, but she's clearly not weak. And seeing how strong some of the Stern Ritters have been shown to be, Liltotto is likely to be very strong. After all, if she's weak, I doubt Yhwach would have given her a position in the Stern Ritter.