Julia Krystal

Masumi Kotsu is a character in the Yu-Gi-Oh! ARC-V anime and is the representative for the Leo Duel School Fusion Summon course.

Etymology
Masumi means "beauty" and purity", most likely referring to her affinity of jewels, her father's occupation and her Deck.

Personality
Masumi, is a direct individual, showing little to no hesitation in saying what she believes. Due to her father's job and witnessing and appraising the value of jewels, she is seemingly capable of detecting talent and hesitation within people, as she did with Yuzu at the start of their duel. Although she shows a penchant for mockery, most of what she states is accurate thus she does not act out of plain arrogance but on observation.

Deck
Masumi uses a "Gem-Knight" Deck, which focuses on Fusion Summon, spearheaded by her ace, "Gem-Knight Master Diamond". She chose to use a Gem-Knight deck, because of her father’s occupation as a Jeweler.