He is voiced by Wataru Takagi in the Japanese version of the anime and Jonathan Holmes in the English version, the former of whom also voices Jan Valentine.
Arrogant, cruel, and sadistic, Chaka is often seen as an idiot by his peers. His earlier appearance showed that Revy's reputation as a gunman in Roanapur is such that even the Yakuza in Japan have heard of her. And of course, he would try to move in and win her over. Shortly after Yukio becomes the boss of the Group, Chaka makes his bid to take over the leadership by kidnapping her with the help of a street gang.
Chaka is also a total coward with no sense of loyalty. He beat up one of his own men, simply for not being able to control his temper, and shot his own men for trying to escape, an action bad enough to disgust Revy. The depth of his despicableness has been noted by many fans and he is widely considered to be the most evil character in the entire series, which, considering the nature of the show, is saying a lot.
It is ironic that, despite being the most despicable character in the series, he is also one of the most incompetent. He grossly overestimates his abilities, as shown by his trying to take on Revy one-on-one even after seeing her and Ginji Matsuzaki tear through his entire gang like they were nothing. She kicks him in the face and decides he is not worth killing, instead letting Ginji slice him to pieces and drown him to death, which Ginji claimed was too nice for him but was at his level.