Sir Erical is a character in the first RuneScape novel, Betrayal at Falador. Erical was a retired White Knight that lived in the Falador Almshouse. At some point during his service, Erical lost an arm in combat.
The traitorous Sir Finistere, wanting to avert suspicious eyes from himself, framed Erical, forcing him into hiding. Erical eventually confronted Finistere in the Falador Sewers, but at an elderly age, Erical was unable to defeat him. Finistere stabbed Erical in the stomach, leaving his body in the sewers.
His name is a play on the word Spherical.