Who married Erza?

Technically Erza and Jellal do NOT end up together though in the anime, they do tend to get close with each other. For example in one of the episodes Jellal and Erza were very close to kissing, but right before it could happen; Jellal pushed Erza away.

Read more

Who is Erza lover?

Jellal Fernande. In turn, Erza looked up to Jellal and admired his strong sense of justice. Even after Jellal's betrayal (albeit possession at Ultear's hands), it is stated by Simon that Erza loved Jellal to the point where she could not even bring herself to hate him. Is Frosch a boy or a girl? Frosch is referred to with gender non-specific pronouns in Japanese, so his gender is undeterminable at this time. Actually, according to this http://www.mangahere.com/manga/fairy_tail/v38/c374.5/24.html he's male.

And another question, what is minerva's magic?

Minerva's Magic being used Territory ( ???? ????? Teritor?): Her Magic revolves around the manipulation of space, which allows her to manipulate any spatial region within her line of sight. This has been used to block one of Natsu Dragneel's powerful Lightning Fire Dragon techniques with little to no effort. Keeping this in consideration, can frosch fly lector? Because them flying were never heavily needed in the story, they are already introduced as exceed so obviously they can fly just like any other exceed in the fairy tail world.

And another question, what is gray's weakness?

Weakness: Gray cannot eat the ice created from his own Devil Slayer Magic to replenish his stamina. Is Gray evil Fairy Tail? Also, Gray is quite skilled in acting as an evil person, as shown in year X792, when he infiltrated Avatar on Erza's request, something that manages to prompt Briar to remark Gray's desire for "revenge" against E.N.D. has stained both his soul and skin.

Keeping this in consideration, who is the strongest of the 7 kin of purgatory?

Azuma, Ultear and Rustyrose were the most notably powerful members of the Seven Kin; Azuma is able to engaged two of Fairy Tail's most strongest wizards, Mirajane and Erza, and his strength was shown with he being able to destroy an entire fleet of Magic Council ships.