Merlin is the most powerful of the Prismriver sisters, but she doesn't have very good control of it, so it's risky to try and take her by force since no one will know exactly what will happen. She likes those who compliment her looks and promise that she's the cutest of the sisters, so be sure to befriend her for the easiest and most worthwhile capture. She's also the healthiest of the sisters, so accept the invitation to tie her in any manner that emphasizes her chest, even if she won't allow touching it the first couple of times she's captive. When it comes to her gag, fully cover her mouth and emphasize her hair.
