Gyl would ask His vice, Elise for help in this, He’s not exactly experienced in romantic relationships, nor has He been very interested in having one (but in this case let’s say that His love makes Him interested in doing so), although I think Elise would hestitate, since She likes Gyl, so I think it would be a love triangle situation.
Sora would definitely be the shy type, She’s not exactly experienced in social interactions, so She would only talk to this person every now and then, often being the awkward one that ends up ending the conversation, but I’m sure that Lilith would definitely help Her out with Her lack of social experience.
Lilith would be more agressive in Her approaches, which is both an advantage and a weakness, while this person would get acquainted with Her and know Her well, She’s still young and naive, meaning that She would be easy to manipulate, and if She does get into trouble due to this, I’m sure Sora would come to Her rescue.
(whew that was a long one)
WWYCD if they get transported a thousand years into the future, wherever human civilization will have been by then?