Siris

"The three of us set out to stop criminals. We do good, we get paid. Everybody wins. Ransom makes no better than the guys we're trying to take down!"

- Siris to Locus and Felix in Call

Mason Wu, codenamed Siris, is a bounty hunter who was once affiliated with Locus and Felix. Interested in their skills, Siris hired the two mercenaries to assist him in kidnapping a man named Gabriel Lozano, in order to use him as a bounty.

Role in Plot
According to Felix, Siris hires Felix and Locus in need of their help to apprehend Gabriel Lozano, the son of a wealthy man named Reuben Lozano, in order to use him as a bounty. After locating Lozano at a nightclub, Locus and Felix infiltrate it and kill several of Lozano's men. They then kidnap Lozano and regroup with Siris outside the club, before escaping. However, the three soon discover that Gabriel has no bounty on him, meaning that they will not get paid for their actions.

Siris soon becomes extremely concerned over the fact that they kidnapped an innocent man, but Felix explains that because Gabriel is the son of Reuben Lozano, a very dangerous man, he is technically not so innocent. Felix then manages to convince Locus and Siris that they can still get compensated for kidnapping Gabriel if they hold him for ransom, which Siris and Locus reluctantly agree to. The three take refuge inside an abandoned warehouse at a quarry and call Reuben Lozano, in which Felix explains that they are holding his son for ransom.

Reuben, however, tells Felix that he does not care about his son and reveals that he knows his name, Locus' name, as well as their location. He then threatens to kill them for both damaging his club and killing his men and adds that if they manage to escape from him he will harm their loved ones. As a result, Siris, having a wife, tries to call off the ransom, but Lozano declines his offer and hangs up. Because of this, Locus kills Gabriel.

Trivia

 * Siris is voiced by voice actor Chris Sabat, best known for providing the English voices for several anime characters, such as Vegeta and Piccolo from Dragon Ball Z.