I'm not sure if you have anything specifically in mind for this, but Lucille is from a small town relatively close to Recolle. Her family is pretty active in the community, so if you wanted to go that route, maybe they knew each other? He's a few years ahead of her, so it could be something as simple as "oh yeah, that person in x class".

Look, apparently I just enjoy throwing tags into your inbox, so if nothing else vague gestures fellow college students idk