It's interesting because Andromeda has a complex family history. Her connection to the Black family and her break from their dark traditions add depth to her relationship with Harry. They can both find solace in each other, with Harry being an orphan and Andromeda having lost most of her family. In fanfiction, this can lead to some really emotional and poignant storylines. For example, they might bond over their shared losses and the need to create a new family of sorts. The age difference also brings a different dynamic, not just romantically but also in terms of mentorship. Harry can learn from Andromeda's long - lived experiences, and Andromeda can find new hope and purpose in Harry's youthful energy and his fight against the forces of darkness.
The pairing is interesting in fanfiction as it gives a fresh perspective on Harry's relationships. Most of the time, we see Harry paired with people his own age. But with Andromeda, it's a whole new ballgame. Their relationship can be a way to explore different aspects of the wizarding society. Andromeda has insider knowledge of the old pure - blood families, and Harry can use that knowledge in his ongoing battle against the remnants of Voldemort's followers. Also, their relationship can be a source of scandal or intrigue within the wizarding community, which makes for some exciting plot points in fanfiction.