Ruark Boldstream is a member of Skipper Banjon's crew, he's being trained to succeed Banjon as Skipper. He plays a major role in the rescue the Redwallers and Lord Mandoral Highpeak launch on Althier. When Banjon goes to Green Isle, he volunteers to remain behind, keeping half of the crew to guard the Abbey.
He appears in The Quean and The Rhulain trilogy.
Ruark is the Skipper of Otters in The Sable Quean