DreamHunter is the pairing name for Kaia Nieves and Claire Novak - a mashup of Dreamwalker and Hunter. The alternative name is Caia. Both were coined following the appearance of promo photos for 13.10 Wayward Sisters which showed the characters together. The ship was considered to have sailed following the airing of the episode in which a romantic connection formed between the women.
In 14.03 The Scar, Jody says : Claire's been doing so good, and, I mean, anything connected to Kaia, she's a powder keg. First love strikes quick, and to lose it like that..."