Teika Midarezaki, a seven-year-old lion with the maturity of a thirty-year-old human, stands as the second son of the Midarezaki family and the final heir to the ancient "Brown Emperor" lineage. His bloodline grants him the rare ability to command animals through his voice, a legacy tracing back to his ancestral savannahs within the Greater Japanese Empire’s territories. The destruction of his pride, which he alone survived, forged an unyielding resolve to shield his adoptive family from similar tragedy, anchoring his principles in honor, loyalty, and self-sacrifice reflective of his royal roots.

Formal yet devoted, he addresses siblings as "Honorable Sister" or "Honorable Brother," while sharing an especially protective bond with Yūka Midarezaki, the eldest daughter, whom he accompanies as both steed and guardian. His childhood friend Madara navigates one-sided affection, complicated by Teika’s initial obliviousness to her gender.

Clad in dark orange fur with watchful brown eyes, he balances regal poise with adaptability, engaging in household routines and even assuming mascot duties during a magical-family escapade. His story intertwines the preservation of his royal legacy with the complexities of human kinship, focusing on steadfast loyalty and the quiet integration of two worlds.