CrabTalker
The name of the giant that attacked the abbey is "Crabtalker". He is captain of a sloop called "The Crab's Pincer" along with a crew of approximately thirty goliaths. He had originally considering joining BigTime's horde, but after waiting around for the pirate armada to "get it's shit together" he became impatient and struck out on his own.
His intention was to kidnap Abbess Angelique and ransom her back to the Abbey for "a pile o gold and jewels, like", failing that to just sack and loot the place.
Crabtalker has a uncommon ability called "Shellspeaking" which allows him to charm and control the giant crabs that arecommon in Gianthome. Typically he uses this giant crab as a mount.
Crabtalker also posses a mighty cannon, such giant sized weapons seeming still at least somewhat rare among the giants.