User blog comment:IamJakuhoRaikoben/Chapter 449: Mavis & Zeref, Review./@comment-84.151.156.209-20150827131540/@comment-7418318-20150827232145

Bacchus and Cana? Pretty simple: Alcohol. Who else can they dirnk with, without having their drinking buddy end up in a coma half-way through the night. :P

Not to mentiont that they got along quite nicely in the pool in Ryuzetsu Land. ^^

Hibiki probably comes from him being nice to her and even shielding her with his body when Brain attacked the allies forces (right before Jura comes out of nowhere and saves them and Brain takes off with Wendy). He also admires her for how she treats her Spirits. I've also seen some people bring the argument that he's into Celestial Spirit Mages in general, since he loved Karen... doesn't make sense to me though. .... and of course his reaction to Gemini flashing Lucy's chest.

I think he's just a gentleman playboy and would have been nice to ANY female (or at least any attractive female), so I personally don't interprete much into his gestures.