Rose Thorn is the name given to the red scarf owned by the late Scarf Hero, Rosina Lanette. The scarf itself looks like any normal scarf; however, the scarf can be used for battle, as it can produce a wide array of thorns. These thorns can stay on the scarf or fly off, effectively making Rose Thorn a threat in both melee and ranged combat. This scarf is a prominent figure in the lives of Haru and Rosina.
Currently, no one knows how the scarf got the power to release thorns from within, but most people presume the following paragraphs to be a plausible history for Rose Thorn.
At first, Rosina never meant to have a scarf of her own. Rosina's mother was particularly fond of sewing, but all of the things she would sew were meant to be sold for income. Not a single scarf was to be made for her, nor did she need one living in a very rural area. It was just another thing to wash, another burden on the hands of a child. On her seventh birthday, her mother had given Rosina a precious red scarf, woven from the softest fabric they could find. Though hesitant at first, Rosina soon came to love the scarf as her own, much to her mother's delight.
As one would expect, Rosina grew connected to the scarf, wearing it whenever she could. As such, the scarf would constantly get messy, and with each adventure in the Farmlands came a new wash. During one of Rosina's adventures, she accidentally dropped the scarf somewhere along the path home. Unable to find it, she eventually cried herself to sleep, wishing that it would return. The next day, she awoke to find her scarf neatly placed next to her. Shocked, she wrapped it around her neck and went to look for her mother.
Rosina found her mother amidst her small garden, where all the plants she could salvage were kept. On this day, however, Rosina noticed that all the plants that grew there were all dead. Shocked, she asked her mother what happened, but her mother merely smiled and told her to play. Pouting, Rosina eventually walked off, feeling an odd sense of itchiness from her neck area. Annoyed, she pulled off her scarf, only to notice that her scarf felt different than before. It had small bumps around it, which seemed strange. Unable to solve the answer, she pushed it aside and continued on her way.
It was not until she joined the Scarf Heroes that Rosina fully understood her scarf. During one of her missions, Rosina was tasked to search the Old City for anything which may prove useful. During her mission, she came face-to-face with rather odd mercenaries. Being charged at by one of the mercenaries, Rosina could not grab her sword in time and instead grabbed her scarf. Doing such caused the scarf to stiffen up, almost like a club, and slam directly into the face of the mercenary, leaving a small thorn in his cheek. Baffled, the other mercenaries attacked, but were faced by the same issue. She then decided to return home and figure out her scarf.
Upon arriving back at the Citadel, Rosina decided she would return home the next day to ask her mother. When the time came, her mother had simply smiled at her, explaining to her that a loss can be the greatest find. Unable to figure it out, she asked again, only to be scolded by her mother. Her mother then pointed to what was the garden, which was now a simple part of the dirt. Realizing that one moment in her life, Rosina finally understood; when her scarf had disappeared, she wished for it back, and though she never believed that miracles were possible, her scarf had managed to return. Perhaps her mother knew more than she let on, or perhaps it was the work of some magical entity, but her scarf had returned to her with a bit of the garden. Though the garden wilted and died, the scarf kept the garden alive in it. Unable to comprehend the whole idea, she asked her mother, only to get a long sigh of disapproval.
Being a rather oddly made scarf, Rose Thorn can not only produce thorns, but also shoot them out in all directions, somewhat akin to bullets, or stiffen itself up to function as a spiked club. Therefore, this weapon can be both melee and ranged.
There are many varieties of thorns produced by Rose Thorn, some of which are listed below. It is thought that Rosina and Rose Thorn have a special mutual connection, thus allowing Rose Thorn to understand Rosina's thoughts and adapt accordingly. Alongside this, Rose Thorn also uses its thorns for security, and thus, only Rosina can wield it without being injured by sharp thorns.
Flame Thorns~ These thorns are slightly weaker than Normal Thorns, but can cause small burns upon impact, and can even cause a fire with enough force.
Light Thorns~ These thorns are considerably weaker than Normal Thorns, but produce at an astonishingly quick pace, thus making up for power with quantity.
Metallic Thorns~ These thorns deal a lot more damage and hit harder than Normal Thorns, but are have less range and produce at a rather slow pace.
Normal Thorns~ A normal thorn, with a rather normal effect, damage, range, and production rate.
Poison Thorns~ These thorns produce a bit slower than Normal Thorns, but deal adequate damage and may poison the target, provided enough of them hit.
Sleep Thorns~ The first type of thorn used, these thorns produce at a slow rate when compared to Normal Thorns, but will cause anything to sleep upon hit.
Apart from being Rosina's main weapon, Rose Thorn also functions as her proof of being a Scarf Hero.
No one truly knows the story of Rose Thorn, not even Haru.
Haru currently holds the scarf, keeping it in his room, under the bed.
It is presumed Haru knows how to use Rose Thorn, or perhaps resonates with Rose Thorn as his mother did, as he is not injured by it.