Nanook of the North

Nanook of the North was a nickname given to Odo by Vic Fontaine, as a means of personifying Odo's personality, which was compared to an icicle, further stating "Cool is one thing, but you're frozen solid."

Upon learning of Odo's affection for Kira Nerys, Vic attempted to lead Odo down a path that would let him thaw out a bit, so that Odo could allow his emotions come to the surface, so as to win Nerys' heart. 

Nanuk aus dem Norden