「うん、ビスクドールの様なエリカさん」「そ、その表現は少し気恥ずかしいから止めてくれない？」

「、」「、？」

'Yeah, Erika, like a bisque doll.' 'Th-that comparison is a little embarrassing, could you stop?'

Literal

''Yes, bisque-doll [possessive-の] like-な Erika-san'' ''Th-that expression [topic-は] a-bit embarrassing-[because-から] stop-[giving-てくれない]?''

A compliment deflection. ビスクドール is an unglazed porcelain doll, associated with French/European antique dolls famous for delicate features — used as a beauty comparison in Japanese literary and romance contexts. 気恥ずかしい ('slightly embarrassing, bashful') is a formal word for mild self-conscious embarrassment. ~てくれない with rising intonation is the soft negative request form.