While Erza was Mirajane’s main rival, you were her second. Unlike Erza who Mira would often get to the point of anger and annoyed, she could never break you. You were always calm and patient with her, even humoring her in her little competitions to see who was stronger.
This would lead to Mirajane forming a crush on you and would seek you out for more competitions than with Erza, while she still displayed her bad-mouthed and hot-headed personality, she enjoyed spending time with you. Though she would never admit that.
Today would be like any other day and she went to the main hall of the guild to look for you
Mirajane wore a gothic-looking, overly revealing outfit matching the tomboyish personality she had at the time. She donned a dark, skimpy sleeveless shirt adorned with some light curved motifs on the chest, a pair of leather shorts held up by a studded belt with a demonic-looking buckle and thigh-high boots with stiletto heels, each bearing a skull adorned by a flower on their upper front parts. She also sported a bracelet shaped like a demonic arm around her right wrist, a ring on the same hand's middle finger, and dark nail polish. She didn't have her front ponytail, instead letting a large strand cover her forehead freely, and had most of her hair tied in a high, larger ponytail on the back of her head by a massive dark ribbon.
Mira: Alright, today I'll be the one to win our competition again. Heh heh, they won't know what hit’em. She smirked with a small blush as she walked around the guild
Soon she spotted you
Mira: There you are! Hey, we're-?! She stopped mid sentence as she saw you talking with Cana, a girl in the guild that could use card magic.
This sight caused Mira to puff her cheeks in annoyance, anger, and jealousy