Mash appears as a young man with a lean, athletic build typical for someone his age. He has spiky brown hair, which is partially covered by a green bandana that he wears at all times. His overall appearance is modest and unassuming compared to the more flamboyant or divine characters in the series.

As a dragonkin, Mash eventually unlocks the ability to transform into a dragonoid form. In this state, his body is partially or fully covered in green scales, consistent with his dragonkin heritage. His stature increases slightly, and his overall physical presence becomes more imposing.

In an alternate timeline, a corrupted version of Mash known as the Dragon King emerges after he loses Elulu to a deranged Holy Sword ritual orchestrated by his world’s Great Mother of Dragons. This version of Mash is taller, roughly the same height as Seiya, with slightly longer hair and no longer wearing his signature green bandana.

His eyes turn black with glowing green pupils, and his body bears cursed scars, a visual manifestation of his grief and vengeful fury. As the Dragon King, he wields a green Holy Sword infused with the tormented soul of the sacrificed Elulu, making him both tragic and terrifying in his power and presence.

Mash is portrayed as a young and earnest warrior, driven by a sincere desire to become strong and worthy both as a hero and as a companion to his childhood friend, Elulu. Despite his somewhat naïve outlook, Mash is courageous and loyal, often putting himself in danger to support his allies. He holds deep respect for Seiya, even as he becomes exasperated by the hero’s excessive caution.

Although mostly pure-hearted, Mash occasionally exhibits traits of a closeted pervert, a tendency that is often played for comedic effect and attributed to his youth and inexperience.

The Dragon King is an alternate-timeline version of Mash, shaped by the traumatic loss of Elulu, who was sacrificed in a corrupted Holy Sword ritual. This version of Mash is consumed by rage, bitterness, and despair, and has become vengeful and arrogant, harboring hatred toward dragons, humans, gods, and heroes alike.

Guided by the mad and corrupted Holy Sword that contains Elulu’s tormented soul, the Dragon King walks a dark and violent path, driven by grief and a desire for retribution. Unlike his original counterpart, he shows little empathy or restraint, acting impulsively and with destructive intent.

Mash was born in a remote village alongside his childhood friend Elulu, both of whom are members of the dragonkin race. Despite their mostly human-like appearance distinct from the more reptilian traits commonly associated with dragonewts the two were marked by a prophecy at birth. According to this prophecy, Mash and Elulu were destined to assist the summoned hero in the quest to defeat the Demon Lord threatening the world of Gaeabrande.

Due to this divine designation, Mash was raised with the expectation that he would one day serve a pivotal role in saving the world. This prophecy leads him and Elulu to join Seiya Ryuuguuin as his companions upon his summoning. However, Seiya true to his overly cautious nature initially deems them unworthy of combat and assigns Mash the menial role of equipment carrier.

Despite this humbling start, Mash remains committed to his mission and gradually grows stronger under Seiya’s harsh training. His loyalty to both Seiya and Elulu plays a key role in his character development throughout the series.

While Mash is not initially strong enough to face the powerful demons of Gaeabrande on his own, he demonstrates significant latent potential. At Level 21, his stats are already considered impressive by normal standards, hinting at his capacity to eventually rival or even surpass elite warriors including Seiya Ryuuguuin in terms of physical strength.

Dragonewt / Dragon Man Form
Mash gains access to his Dragonewt form after having his latent power awakened by the Great Mother of Dragons, Leviae. This partial transformation taps into his dragonkin heritage, greatly boosting his physical capabilities and combat stats for the duration of the metamorphosis. However, the time limit and sustainability of this form remain unclear, and he is initially unable to maintain it for long.

Dragon God / Divine Dragon Form
Through intense training with the Goddess of Sealing, Ariadoa, Mash manages to break the internal seal that was suppressing his full potential. This breakthrough allows him to unlock his true Divine Dragon form, a transformation far more powerful than his previous Dragonewt state. In this form, his stats are enhanced exponentially, elevating him to the level of a dragon deity, capable of standing against high-tier threats.

Emperor Dragon Metamorphosis
The pinnacle of Mash’s transformation abilities is the Emperor Dragon Metamorphosis, a technique that surpasses even the Divine Dragon form. Once activated, Mash reverts to his human form physically, but retains the immense power, stats, and skills of his fully awakened dragon state. This allows him to maintain peak combat performance without the physical strain or limitations of transformation, making it his most efficient and powerful form.

Elulu
Mash shares a deep and longstanding bond with Elulu, having grown up with her in the same rural village. As fellow dragonkin and prophesied “chosen ones,” the two have been close since childhood. Mash holds Elulu in great respect and affection, viewing her not only as a comrade in the Hero Party but also as his most trusted friend. Their shared destiny and experiences create a strong emotional connection, and he is fiercely protective of her.

Seiya Ryuuguuin
At their first meeting, Seiya harshly criticized Mash’s abilities, causing Mash to initially resent him. However, as he witnessed Seiya’s strength, discipline, and unshakable resolve, Mash’s opinion gradually shifted. He eventually began to refer to Seiya as “Master” and came to admire him as the capable leader of the Hero Party. Despite Seiya’s cold demeanor, Mash strives to follow his example and improve himself under his guidance.

Ristarte
Mash sees Ristarte as a trusted comrade within the Hero Party and respects her divine status. In return, Ristarte often acts as a mentor or older sibling figure, attempting to help Mash mature and guide him along the path to becoming a responsible adult. She treats him with kindness and patience, occasionally stepping in to balance Seiya’s severity with encouragement and support.