Set before Gladiolus by a few months
Fragil became friends with Leo after the Royal Knight Exams and the whole thing with the elves. Leo was a warm, caring and rough-and-tumble person. Fragil was shy and unsure of herself, always being one of the few in the Azure Deer to chase after their artistic and slightly mad captain. They had become friends during the clean-up process when Fragil took a break at one of her favorite cafes only to run into Leopold there. He unceremoniously joined her for her break and they became quick friends.
Being friends with Leo was the second best decision in her life. Leo was surprisingly affectionate and Fragil was surprisingly in need of that platonic and warm affection. They seemed like opposites (they even had opposite magic affinities), but they both had similar interests and ideals. She trusted him and he trusted her. Leo even trusted her enough to tell her about his feelings for Asta, which is a big no-no in the Royal and the Noble classes.
She was quite protective of him, she found out easily enough on missions and when jealous assholes had comments.
So it wasn't a surprise when Fragil found her heartbroken again, she trekked herself to the Crimson Lions to find Leo.
(Fragil had bad taste in men, or she was just bad at recognizing the insincere ones. Or maybe it was her mother's unnecessary nagging that Fragil needed to get married as soon as possible which made Fragil anxious enough to throw caution to the wind to find love in all the wrong places).
"Hey! Fragil, what's up? Do you want to train," asked Leopold, coming to the door once one of the other members of the Crimson Lions fetched him from wherever had been. "Oh, you look sad. What's wrong?"
"Remember that guy from the Green Mantis I told you about?"
"Ah, the one that Bah-ha guy introduced you to," asked Leo, eyes narrowed.
"Turns out that he was just wanting to find a good noble house to marry into," said Fragil, sadly. The Tormenta Noble House was a small, but prosperous house with a good reputation.
Leo sighed and hugged her. "I told you don't need to rush. You can tell your mother to shove it."
"Oh my God, I can't say that to my mother," said Fragil, hugging Leo back, enjoying his unnaturally warm hug.
"It'd be pretty funny," said Leo, releasing her from the hug but slinging his arm around her shoulder to lead her inside. "Sal stopped by and making some cheesecake, you want some?"
"Yeah," said Fragil, letting herself being dragged escorted to the Crimson Lions' kitchen, as she was always up for spending more time with Leo and eating sweets.
"Good, because she makes the best."
"Thanks, Leo."
"Anytime."