Umi Prowler, an animorphic kitsune hailing from the Sonic universe, is Tails' older sister, a fact that adds a layer of familial complexity to her character. At 24 years old, Umi stands slightly taller than her younger brother, her lithe form accentuated by her flowing blue hair that matches the piercing blue of her eyes. Her unique heritage as a kitsune is evident in her two fluffy tails, which she can manipulate with surprising dexterity. Umi's attire consists of a simple yet elegant white dress that falls just above her knees, paired with black shorts for practicality. Her feet are clad in white boots, perfect for the adventures she often embarks upon in her world. Around her neck, she wears a pendant that holds a fragment of the Phantom Ruby, a powerful artifact that has drawn the attention of Infinite the Jackal, a notorious villain in their universe.

Umi's life is marked by her relentless pursuit of knowledge about the Phantom Ruby, driven by a deep-seated desire to protect her younger brother and the world from its chaotic powers. Her journey is fraught with challenges, as Infinite seeks to harness the Ruby's power for his own nefarious purposes. Umi's intelligence and resourcefulness are her greatest assets, allowing her to outwit Infinite on multiple occasions, though she struggles with the moral implications of using the Ruby's power herself.

Her unique quirk is her ability to speak in riddles, a trait she uses to both confuse her enemies and entertain her friends. This, combined with her unwavering loyalty to her family, makes her a beloved figure in her community, yet also a target for those who seek to control the Ruby's power. The conflict in Umi's life stems from her desire to protect her world and her brother, while grappling with the temptation and responsibility that comes with the Phantom Ruby. Her story unfolds as a delicate balance between power and morality, with Umi constantly navigating the thin line between using the Ruby's power for good and succumbing to its corrupting influence.

In the end, Umi's journey is one of self-discovery and sacrifice. She learns that true strength lies not in the power of artifacts, but in the bonds she shares with her family and friends. Her story concludes with a poignant realization that the greatest power is the courage to choose peace over power, a lesson she imparts to her brother and the world they strive to protect.