Gailadine is the daughter of a Mirkwood elf and a beautiful Gondorian lady. Her parents were both roamers by nature and were residing in Rohan for a time when they suddenly died. Gailadine was still a young child, but had her parent's roving spirit, so after their death she took to the mountains. There she lived and explored, and grew into a tall, beautiful lady.
Once when she was on the side of the mountains closest to Gondor, she was attacked by an orc. She was badly wounded but fortunately spotted by a young man, who carried her to the houses of healing. She recovered, and remained In Gondor. Her rescuer, Celedin, who is also half-elf, became her husband.The two often fall into adventures together, frequently battling orcs and evil men and rescuing eachother.
Gailadine is her Elven name, Rosena her Gondorian one.