Movie
Description
Boo-chan, also known as Botaro Ikawa or Bo Suzuki, is a five-year-old friend and classmate of Shinnosuke Nohara in the Sunflower class at Futaba Kindergarten. He holds the title of tallest member in the Kasukabe Defense Organization, primarily due to the length of his head rather than overall height.

His demeanor often seems slow and expressionless, with measured speech. Despite this, he displays notable intelligence and surprising insight, especially concerning artistic or adult subjects. His interests involve collecting uniquely shaped stones, investigating urban legends, UFO sightings, and other mysteries, claiming knowledge of locations in Japan for rare stones. After kindergarten, he regularly visits a local Kasukabe tatami mat store to observe the craft.

A persistent trail of mucus runs from his nose, which he manipulates to perform tricks. In group activities, he consistently volunteers to portray pet animals like dogs or cats. Within the Kasukabe Defense Organization, he shares strong friendships with Shinnosuke, Masao, Kazama, and Nene. Shinnosuke sees him as an understanding friend who readily joins imaginative games. Masao notes Boo-chan is one of the few who comprehends his emotions and offers comfort.

Details about his family are limited. His mother appeared once in the manga, shown having a loving relationship with him; his father has never been shown. Friends once tried to follow him home to see his mother but lost him during a parade, glimpsing her only from a distance without discerning her features.

In *Super-Dimension! The Storm Called My Bride*, an adult Boo-chan appears as a roboticist and inventor. In *Crayon Shin-chan the Movie: Super Hot! The Spicy Kasukabe Dancers*, he experiences a dramatic transformation in India. After encountering a mysterious nose-shaped backpack and inserting a piece of paper from it into his nose, his characteristic runny nose ceases, his expression sharpens, and his movements become swift and intense. This altered persona, "Tyrant Bo-chan," acts coldly towards his friends, dismissing Shinnosuke's concern with "What do you even know about me?" The Kasukabe Defense Organization works to reverse this change.

During *Crayon Shin-chan: The Storm Called: The Adult Empire Strikes Back*, Boo-chan is among the children left behind when adults are lured away. He joins Shinnosuke and the Kasukabe Defense Organization in seeking refuge, evading capture, and confronting the forces orchestrating the regression to a past era.