Yusuke's hatred becomes more severe at times, especially if he is being taunted by his enemies. The result was he got a mental vision of Ultimate Form after killing Jaraji brutally which was a warning of what would happen to him if he continued this path.

After realizing that the Gurongi kill people for their own satisfaction and want to kill more innocent people, Yusuke couldn't help but feel anger. The most crucial part was at Jaraji's incident which had driven Yusuke to hate the Gurongi. However, despite being an overall good person, it doesn't mean that Yusuke never shows anger. Despite his sorrowful childhood and his own crisis as Kuuga at some point, Yusuke's smile never falters. As long as it's for other people's sake, Yusuke will never hesitant to do anything, particularly after becoming Kuuga. This charity is what made Yusuke could easily befriend the others and also give them hopes. Despite being in a hard situation, Yusuke never lets go of his smile and always tries being optimistic most of the time. His cheerfulness sometimes also could encourage the others, particularly at dark times. While serious about keeping his vows, Yusuke will break some if he considers it absolutely necessary.

Yusuke constantly seeks to better himself and as a result, gained 2000 skills because of it. Yusuke is a happy-go-lucky and honest person that fights to protect everyone's smile. His body is entirely black with gold lines all over. Ultimate Form is based on a Stag beetle, a Dragon, a Demon, Darkness and N-Daguva-Zeba. Kuuga is based on a Stag Beetle, his body is black with a red chest plate and shoulder pads, he has golden bands on his wrist legs.

Kamen rider kuuga ultimate sic