[ Sincerity then. Something that doesn't often come his way, and something he can't often trust in back home. Here, things might be different, given that his status as a member of the Fatui means nothing to the vast majority. But it's hard letting go of the wariness all the same. ]

[ Lyney's eyes soften noticeably at the mention of a sister, considering over the pros and cons of the situation. Jinwoo's offer to withdraw the guardian is a positive in his considerations, but having an active bodyguard, especially after agreeing to assist in Master Childe's less savory affairs, may not leave the best impression. ]

[ And more importantly, depending on what he finds out, it's something he could put to use himself. ]

... I'd like to know more before giving my opinion, if there's more you can tell me.

[ He suspects there's a great deal of information at hand that he doesn't know, given that Jinwoo hadn't asked for permission in the first place. ]

Mainly around the topic of privacy and information shared or withheld. I don't imagine you've spent this entire time listening to him relay information about my daily affairs, but what does he pass back?