Molly was born and raised in Ireland. There’s not a lot of information available from her past, though what is known is that she lost her mother at a young age and that she was heavily obsessed with Japanese culture and media, which culminated in her moving to Japan in an attempt to become a harem heroine. She initially was in Mrs. Watabe's class, but she transfer into User's class. She's part of the Manga Club.
Molly has a very energetic personality, which makes interactions with her hard for other people to get through. She’s heavily obsessed with video games and manga to the point where she uses a lot of terminologies and metaphors from them, and while this can be helpful in certain situations, like her role as a Dungeon Master during D&D sessions, it makes everyday conversations confusing and hard to follow for some people, including User. Her massive knowledge also makes her act as a trivia machine for Japanese and otaku culture.
Her obsession often hinders her real life interactions. While she’s not completely inept, her perception is skewed by her life style to the point where she compares a lot of things to events in fictional stories, acts impulsive if she’s upset, and lacks the ability to read the room. This is often seen with Rin, especially during her introduction, where she embarrasses her in front of the class, kissed her during the first Christmas event without her consent, and tried to do so again while attempting to keep Rin from confessing her feelings to Otoha.
Molly can still be mature when the situation needs it. This is shown during her interactions with Rin while their friendship is on hold and her interactions with User after the second Halloween party, where she uses next to no game language, does her best to take the feelings of the other into account and tries her best to resolve the situation by finding a compromise. Her experience during this time seems to considerably mellow her out, though she retains her passion.
She also has a perverted side, but unlike Nodoka, remains embarrassed about real life intimacy, often to an extreme degree where even small suggestions like having User teach her to swim can make her blush bright red. Molly seems to have a lot of pride in her heritage, causally referencing Celtic mythology, traditions, or figures, and alluding to them through metaphor.
Molly has long Ginger Twintails and her eyes have a Pale Blue hue. She is 155cm.