Why is Kurloz' mouth sewn shut?

Kurloz's mouth is sewn shut as part of his character design in the webcomic "Homestuck." This feature symbolizes his vow of silence and his commitment to the ideals of secrecy and restraint within his troll culture. Additionally, it enhances his mysterious and ominous persona, aligning with his role as a member of the "Dancestors" and his association with themes of chaos and control.