Hikaru can be described as the brains to his younger brother's brawn. He is generally calm, patient and level-headed; preferring to analyze his opponents and come up with strategies to defeat them, unlike his brother, who is quite reckless and charges into battles head-on.
He's also shown to act heroic when he selflessly grabbed Hyuga's arm when the vine he was hanging from snapped, even referring to himself as a "hero", which implies that he has a moderate level of confidence but not as nearly as enough to border on arrogance.
