|Gender||None (male voice)|
Although Caliburn has not yet made a full appearance in Sonic the Comic Online, he was featured on the cover of the 2008 Hallowe'en Special. The sword can be seen in the hands of the Werehog, another character from that time that has not had a full appearance.
- At the time of Caliburn's appearance on the STC-O cover, Black Knight had not yet been released, making it the first occasion of a character officially appearing on the cover of Sonic the Comic before a video game.
- Caliburn at Sonic News Network, the Sonic Wiki