User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-3325617-20140704231759/@comment-72.196.132.197-20140723003243

^ it's not issei that has a compatibility with dragons it's Asia that has the compatibility that's how she met issei that's how she has a familiar that is a dragon and fafnir, bit to mention vali around her a lot and also the fact that see was able to sway evil dragons to come to her side... But issei on the other hand had the worst compatibility with dragons they all hate him because he has Ddraig