Katsuya
Magical artist
That could work! Like maybe L mentioned about the group following a lead to getting a cure and Lilith, upon arriving to Barad Eithel, is like “ . . . Woah. “ XD Uhhh, we could say that L and Lilith knew each other previously (perhaps they met in person coincidentally or had worked together before) and L knew about Lilith’s desire. So she sent letters about finding a potential cure for the illness that her sister has?Not sure what she can do to help, but sure. Now I just need a good reason for her to be there. Maybe L just told her to go assist the team there?
Would that work for ya? Ask Zer0 about that, just in case.