He is a brutal, sadistic prison warden from the Street Fighter II V anime who likely puts to shame Samuel Norton and Captain Hadley, ruling over a brutal Malaysian prison where he delights in making inmates go through hell. He personally "welcomes" every new prisoner with violent chain beatings and enforces an atmosphere of pure fear, believing that brutality is the foundation of order. He told Ryu when approaching his cell "I just like to greet all the new guest" before taking him to a dark room, where he's chained by his arms and violently whipped and lacerated by a whip until he passed out from pain, with Nuchi enraged that he wouldn't scream or cry the whole time like he wanted, showing he tortures all prisoners, including new ones, who haven't even caused trouble yet, and enjoys it. He was shown in a flashback having tortured Sagat a similar way in the past, with a baton.
Before the torture scene, he said to Ryu "The first rule of this prison is you must fear. Fear the guards. Fear the other inmates, and worse of all, fear me" showing he's motivated by both fear and sadism.
He counts as a hate sink because everything he does is designed to make viewers despise him, he tortures inmates for pleasure, tries to force prisoners to kill each other for gambling profit (ryu and sagat, because the guards bet on who would win between them, then tried to kill Sagat for refusing to continue to fight showing he has no qualm with killing prisoners for minor conviences), and even threatens slow, painful death when they defy him. After the two refused to continue fighting, outraged at being cheated out of the betting money, he decided to shoot them dead, licking his lips, saying he'd prefer gut-shots over headshots, for a slower agonizing death for the both of them.
And despite all of this, he walks away without punishment in the end, still alive, still in control, and still likely to continue abusing prisoners, making him a Karma Houdini as well. Sure, he gets a bad beating at the hands of Ryu and Sagat, but nothing life threatening and nothing to stop him from continuing to be in power and abusing his power.