Ryō Utagawa is an All-Rounder combatant in Border's Kazama Squad. He stands tall with chin-length brown hair usually pulled back and brown eyes. His Trion body wears a standardized uniform: a navy blue shirt beneath a black shrug jacket featuring a prominent cross design across the front, black boot pants, and Border emblems on each sleeve.

Utagawa's personality offers a marked contrast to his squadmates, presenting a notably friendly and gentle demeanor. He frequently steps in to apologize on behalf of Kazama Squad members when their behavior becomes abrasive or rude to others, serving as the diplomatic counterbalance within the squad dynamic.

His courteous nature is evident in statements like complimenting Shiori Usami: "Usami, you look even prettier than the last time we've met." He also takes responsibility for squad conduct, apologizing to Osamu Mikumo and Chika Amatori with the remark, "I'm sorry, his tongue is too sharp," following a squadmate's harsh comment.

Utagawa's background includes a significant incident involving former Border agent Mirai Hatohara, where he was accidentally shot by her during an unspecified event prior to the series' timeline. Additional personal details note he favors dogs, enjoys grilled chicken, and maintains an interest in all types of sports. The etymology of his name reveals "Ryō" (遼) means "far, distant," while "Utagawa" (歌川), translating to "Song River," originates from the historical Utagawa school (歌川派, Utagawa-ha) of artists. His role remains consistently depicted as a supporting member of Kazama Squad fulfilling combat and interpersonal duties within Border operations.