Cynthia is the player character and therefore some of the lines need to work in different versions of the scenes. In the demo she's in a relationship with a very hard to like character who expects her to be submissive to him (Prussia, one down in the list). Since players can embrace or reject this dynamic, and flip flop between different approaches at will, Cynthia's delivery should be somewhat ambiguous. 

Her personality is very snarky, and a little lazy. She's shy and bad with new experiences, but tries to not let it show. In these scenes she will be in good company though, so she should sound comfortable. 

Cynthia will be in a sex scene and will say a few embarrassing, submissive things.

This character has 280 lines.