From A Wiki of Ice and Fire
|Alias|| Mylessa Blackwood|
|Book(s)||A Dance with Dragons (Mentioned)|
Lady Melissa Blackwood, named in semi-canon sources as Mylessa Blackwood and nicknamed Missy, was the sixth mistress of King Aegon IV Targaryen and the mother of one of his Great Bastards, Brynden Rivers. She replaced Aegon's fifth mistress, Barba Bracken.
The godswood of Raventree Hall contains a statue of Lady Melissa, whom Hoster Blackwood claims was much more beautiful than Barba Bracken. While Barba was buxom, Melissa had a slender frame. When Barba joked that Melissa was flat as a board, Aegon had the Teats renamed from Barba's Teats to Missy's Teats to honor his new mistress.