Fairy Tail Wiki:Relación Seis/Thunder Gods

Elfman Strauss
Elfman is Mirajane's younger brother. The two are very close and care deeply for one another, and before Lisanna's return from Edolas, she constantly tried to reassure Elfman that Lisanna's "death" wasn't his fault. She was deeply concerned when she found out that he was one of the combatants sent in to fight Phantom Lord's Element 4. Elfman tries desperately to protect Mirajane, and when he saw that she was in danger of being crushed by Phantom Lord's Giant Mage, he unlocked his Full Body Take Over "Beast Soul" to defeat his opponent and save her.

Lisanna Strauss
Lisanna is Mirajane's younger sister. Mirajane is very protective of Lisanna, and cares for her deeply, to the point that she would take the full brunt of an explosion sent towards Lisanna by Azuma, to protect her. When she thought Lisanna died, her entire personality shifted, and she became kind and motherly.

Erza Scarlet
Mirajane and Erza are two guildmates that share a very friendly relationship. In their younger years, they were rivals. The two fought constantly in a fashion very similar to the way Natsu Dragneel and Gray Fullbuster fight in present day. Mirajane disliked Erza, and didn't want Elfman and Lisanna associating with her or anyone she considered to be on Erza's "team". However, their rivalry ended abruptly when Lisanna, Mirajane's sister, supposedly died. Mirajane's personality changed completely and she became kind and ceased her feud with Erza.

Makarov Dreyar
Mirajane and Fairy Tail's Guild Master Makarov Dreyar are on very good terms.

Laxus Dreyar
Mirajane and her fellow S-Class Mage Laxus Dreyar have known each other for quite a long time, with the two of them having joined Fairy Tail in their younger years. Mirajane is shown to respect Laxus'strength, asking for his help in situations endangering the guild and its members, but also used to get angry at the man for his arrogant and nasty attitude, reprehending him when Laxus insulted their comrades or refused to help out the guild he belongs to even when the latter was in grave danger, something which prompted her to burst into tears, angrily wondering how Laxus could be a member of Fairy Tail acting in such a way. In spite of this, Mirajane seems to care for her fellow S-Class, appearing happy at the thought that Makarov would have readmitted him to Fairy Tail due to his reapppearance on Tenrou Island. It's also worth noting that, while Laxus looks down on Mirajane's rival, Erza Scarlet, said to be the strongest woman in Fairy Tail, he was shown praising Mirajane's Satan Soul: Sitri, hinting at a certain degree of respect and recognition for her.