High exhibits consistently hyperactive, excitable behavior, reacting intensely to situations with bursts of emotion that manifest as literal flames enveloping his body during outbursts of rage or strong feelings. These frequent fiery episodes serve as a defining characteristic, sometimes even utilized by companions as an unintended heat source.

He possesses intelligence and a mischievous side, though his volatile temper poses a significant risk to those who provoke him. His emotional volatility is visually emphasized by a distinctive hairstyle that ignites in tandem with his reactions.

Romantic feelings for Moro, a female friend within his group, form part of his interpersonal dynamics, though the nature of their relationship remains undefined beyond his attraction. He experiences various misfortunes and forms part of an ensemble engaging in eccentric adventures centered around Koni, often finding himself in absurd or challenging situations that trigger his fiery reactions. His socioeconomic status within the group dynamic is poor.