Grath Longfletch was a female otter from Holt Lutra. She was the daughter of the holt chieftain, Lutra, and the eventual partner of Inbar Trueflight. Her entire family was slain by the crew of Conva, the corsair stoat sent by Ublaz Mad Eyes to take the Tears of all Oceans from Lutra's holt. After being injured and left for dead by Conva's crew, Grath was rescued and healed by two watervoles, Glinc and Sitch. During her period of healing, she fashioned a powerful yew bow and a quiverful of green-fletched arrows, which became her "trademark." After recovering, she set off in search of any and all searats on which to vent her wrath. Using the longboat from the Sprayraider, she fashioned a vessel to pursue her enemies. This ship was eventually transformed into the seaworthy Freebeast.