Tamae Honami, affectionately known as Tama-chan, stands as Maruko's dearest friend. Her dark brown hair flows in twin braids, framing bangs parted neatly at the center, while round glasses typically obscure her pupils—though they occasionally reveal themselves. She favors a consistent ensemble: a light blue long-sleeved shirt with a white collar, a dark blue skirt, white socks, and yellow shoes.

Kind, warm, and unfailingly polite, Tamae navigates the world with sensitivity. She tears up when overwhelmed and flares with anger at misbehavior, especially from boys. This emotional depth sometimes summons her alter ego, "Tammy," who voices hidden feelings in stark contrast to Tamae's usual composure; Tammy emerges in Alpine-inspired attire, often against a Swiss mountain backdrop. At home, Tamae frequently clashes with her father, Shintaro Honami, yelling to halt his relentless photography.

Tamae delights in traditionally feminine pastimes—dressing up, role-playing with Maruko, and admiring blossoms during their school walks. Academically gifted, she excels at piano, recorder, and her studies, a counterpoint to Maruko's struggles. Their bond crystallizes in a classic dynamic: Tamae embodies the orderly, rule-following "blue oni," harmonizing with Maruko's free-spirited "red oni."

Her family includes Shintaro and her unnamed mother. Tamae savors foods like melon, pudding, cakes, nabe, curry, tomatoes, natto, carrots, peppers, and shiitake mushrooms. She treasures an autograph from singer Hideki Saijo, shudders at snakes, and idolizes vocalist Momoe Yamaguchi. Analyses suggest Myers-Briggs types ISFJ or ENFP, noting reliability, empathy, and organizational prowess—yet potential difficulty voicing personal needs—or Enneagram 3w2 ("The Achiever"), highlighting drives for validation alongside authenticity challenges.