Rain Hagwell is an S-rank offensive mage in the anime Jack-of-All-Trades, Party of None. She is a member of Selma Clodel's party and serves as a core member of Unit 1, also referred to as the First Unit, within the Night Sky Silver Rabbits, one of the most powerful explorer clans in the Nohitant Kingdom. As a skilled sorceress specializing in offensive magic, she holds an important position in the clan's high-level dungeon expeditions, where her advanced magical abilities and her capacity to coordinate effectively with her teammates make her a dependable and influential figure in combat.

Despite her youthful appearance, Rain is the oldest member of her party. She is small in stature and has a cute appearance, which frequently leads others to mistake her for a teenager. At age 24, she carries herself with the maturity expected of the unit's senior member, and she is described as caring and considerate toward those around her. Her personality reflects a supportive and composed nature, which complements her role within the team.

In terms of ability, Rain ranks among the strongest mages on the continent. She is known for constructing spells at extremely high speed and for casting special-grade magic repeatedly in succession, making her a formidable force in extended battles. She also wields rare spatial-leap magic, which she can employ with lightning-fast casting. Her preferred equipment includes a staff, and her appearance features black hair worn in low twintails with a hairclip, blue eyes, and a two-tone dress in blue, white, and pink, typically paired with a robe. Through her strength, experience, and considerate demeanor, Rain stands out as one of the most capable and trusted members of the Night Sky Silver Rabbits.