Red Moon

Runa is the ship between Ronald Weasley and Luna Lovegood from the Harry Potter series.

Canon Relationship
At the beginning of their acquaintance, Ron Weasley thought Luna was weird and was not particularly interested in knowing her, even occasionally referring to her as "Loony". Luna, on the other hand, seemed to find Ron very funny but rather insensitive in his relationships at times.

Ron eventually grew fonder of Luna, marking her as his good friend, after getting to know her better through Dumbledore's Army and her being one of the only D.A. members to come to the trio's assistance when they tried to save Sirius Black, during the Battle of the Department of Mysteries. He was particularly amused by her Quidditch commentary in 1996 and thought highly of her bravery. When she attended his brother Bill's wedding, Ron was further amused by her behaviour and remarked that she gave "good value". However, Ron was still prone to tease Luna and scoff at her unusual beliefs at times. Ron and Luna also fought at the Battle of the Astronomy Tower and the Battle of Hogwarts, where she, Seamus Finnigan and Ernie Macmillan saved Ron, Harry and Hermione from Dementors. Ron and Luna both survived the war, and the good friends remained in contact in adulthood.

Fanon Relationship
Runa is a very popular side pairing in Harmony stories