Ken Williams is a resident of Soleanna in Sonic the Hedgehog (2006). A cheerful-natured and generous man, he is the manager of a hotel in New City. He is also the announcer for any special events that the hotel holds.
In Sonic's story, Ken gives Sonic his sixth Town Mission. The hotel is running a celebratory event known as the "Festival of Rings", which marks the hotel's 15th anniversary. There are no entry fees, as the event shows gratitude to the people of Soleanna. He encourages Sonic to participate in this festival, and his task is to collect a certain amount of rings before time runs out. As a reward for performing well in the festival, Ken allows Sonic to keep the rings that he collected.