He only appears in Season 3

He is Layla Love interest.

Despite his isolated childhood, Nabu is very social and friendly. He is upbeat, fun and enjoys life to its fullest. But he is also daring and intelligent, seeing as he ran away from home because he disapproved of the arranged marriage and even located Layla and spied on her to know what she was like. Nabu is a patient, kind, honest, understanding and rational person; he also does not get jealous. He shares these traits with Helia and both mediate between their friends who are having conflicts with their significant other, and especially Riven, whose personality is the opposite. Unlike Helia however, he is not shy. His patience is demonstrated when the Winx (especially Layla) and Specialists were suspicious of him because he snuck onto their spaceship. He patiently waited for the group to trust him and did not push them to do so. Nabu is also very true to himself and sticks to his beliefs, which included marrying someone he loved.

In this dub he is voice by: Matt Charles.