User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-967403-20150831181942/@comment-24546844-20150831185048

I guess Mest's thing is more of a memetic thing acnowledged by Hiro than anything. There are some complaints on Zervis too but all of it was played in a different light from Mest's pedo moments, which as you say, most of them can be counted as just platonic and when not, it's just Hiro doing them for fun.

This was supposed to be a tragic moment for Zeref and Mavis. She was a possibility for his lonellyness to end, she understood her, and was willing to spend her life with him. Maybe when you're alone for so long, any light of hope can develop into love.