I am not referring to my personal tastes, but rather that it seems that she will be the only girl with whom DPC creates a happy ending or something similar.
Jill is the only character who has a voice and is part of the introduction of the game, she is the only one who seems to really want to be with you without being emotionally linked to another person (all the other li have "baggage"), she is the one with the most renders , and also, is the avatar of the 100 dollar on dpc patreon xD.
With the other girls, it seems that everything will be temporary and with an expiration date, they can also have long-lasting endings, like the other girls in AL, but in the end there is a main story that DPC wants to capture and I think it is with Jill.