Hanbin seems to like and appreciate effervescent people, one who can go crazily random e.g. Bobby. One of the boys that he's awfully close to.
From that BTS of Blackpink seems like Lisa's one of those people.
And through Nonagon shoots, he probably got to know her more than other girls in BlackPink.
I guess there's a slightly bigger possibility that she's that girl Hanbin had a crush on compared to other girls in YG (?)