Another of Shin-chan's best friends Bo - Chan, he seems slow and expressionless, but is actually quite smart and has an interest in artistic, adult-oriented things. He loves to collect various kinds of stone and investigating urban legends and various mysterious objects such as UFOs. He often surprises his best friends with his insight, though he speaks quite slowly. He has a sister named Nisu-chan. He always has a trail of mucus running down his nose and can perform various tricks with it.
He is known as Boo in the Funimation dub, and he says he never wipes it away because he thinks that his snot is the source of his "power". He is portrayed as a stupid kid who often says nonsensical things like a sufferer from Tourette syndrome. For example, when Penny asked why someone would call Shin's ramshackle apartment "Falling Apartments", Boo responded by saying "I'd call it Boo eats soda and likes lamps." He likes to collect pet rocks, his favorite one is named "Phillip." The Funimation website says that Boo is "sort of like Dim from A Clockwork Orange, or Eeyore from Winnie the Pooh,- without the depression."[3]
