Hanatarou is very timid and nervous. His black hair is a bit long and his bangs frame his face. He tends to be clumsy and easily duped. Hanatarou's kind nature and nervousness results him becoming the victim of many bullies and practical jokes. In fact, he states in an omake chapter in volume 13 that he is "the most bullied kid in the world." Hanatarou's birthday is even on April Fools' Day, so people spend the whole day tricking him as a result. While Hanatarou looks like a wimp, he shows on more than one occasion he is courageous and dedicated to what he believes in. According to Kon, he has "boring but somehow popular with the ladies" looks.

Hanatarou states when he introduces himself that his name is relatively easy to remember, though Ichigo says otherwise, stating that if his name was Hanako (a girl's name) or Tarō (a boy's name) it would be easy. The name Hanatarou, according to Ichigo, is just confusing. Hanatarou's name is actually a play on the name Yamada Tarō, the Japanese equivalent of John Doe, and Yamada Hanako, the Japanese equivalent of Jane Doe. By combining elements from both, Tite Kubo is probably saying Hanatarou is literally a complete nobody.

- from wikipedia.org