Mementos are special items that can be obtained for the girls. They expand the stats of the of the room they are associated with by increasing said stat or by increasing the affection gained when increasing the stat. Each girl has a total of sixteen mementos, four for each room. Mementos can be obtained in one of two ways, either by finding one in the gatcha, the girl you are trying to obtain the memento for must be selected, or by exchanging the girl's special flower from the garden to obtain two.