Kol and Hope

The family relationship between the Original Vampire, Kol Mikaelson and the tribrid, Hope Mikaelson.
Kol is Hope's paternal uncle and helped protect her from Finn, who wanted to kill his niece, so Dahlia wouldn't come.
In the fifth season, it is shown that Hope kept in touch with Kol via phone call and video chat, and still have a close relationship. Kol even refers to Hope as his "favorite niece" despite being his only niece. Kol also understands Hope's frustration about being away from their family, especially from Klaus.
They are known as "Kope" by fans.