1.Gray is more masculine in the manga rather than the anime.(Gray-sama is so hotty)

2.Hiro Mashima the creator of Fairy Tail says that Natsu and Gray are equal when it comes to strength.

Spoiler Alert

3.Gray is a ice devil slayer not just a ordinary ice maker user that is first presented in the series.

Spoiler Free Zone

4.Gray was smoking on the first chapters of the manga but it's been replaced by lollipop in the anime.(WHY?)

5.The creator of Fairy Tail stated that he forgot how he named Gray.(poor Gray)

6.He originally should be a ice dragon slayer but Hiro Mashima change it.

7.He is 18 years old in the start of the manga.

8.His hair is color black in the manga.

9.Gray's eyes are dark blue.

10.Gray first appeared in the manga and on the anime in Chapter 2/episode 2.

Hope you liked it!Vote and comment if you want!