Board Thread:General Discussion/@comment-10048743-20160208024352/@comment-26397825-20160211121321

Jaune's semblance is a force field. It was shown when he was being beaten up by Cardin in the Forever Fall Forest; a bright flash of light that then protected him and knocked Cardin back. This was confirmed to be his semblance in the Directors Commentary of the episode.

It is not healing or regeneration. It is a defensive, possibly even reflective force field that prevents the hits from landing in the first place, unlike normal aura which only stops the damage and doesn't stop the hit from landing.