Arashi Morino, one of five Morino siblings born minutes apart, carries the English-dubbed name Austin Miller. His distinctive personality revolves around aspirations to become a superhero or detective, showcasing strong imagination and ambition. He frequently engages in mystery-solving and heroic pursuits, highlighted in episodes like "Super Sleuth Austin" and "Super Sleuth Austin and the Shattered Shrine."

Characterized as a wisecracking rebel, Arashi blends humor and irreverence with determination and independence, driving his desire for extraordinary achievements. His storylines feature conflicts such as running away from home in "Arashi's Runaway!" and participation in group activities like wrestling tournaments and school field trips.

Specific episodes explore his relationships and challenges, including interactions with friends in "What're Friends For?!" and academic efforts in "Aim for 100, Karl!" He navigates everyday childhood experiences, from being left home alone for the first time to visiting the dentist.