Giant

Giants are large creatures with often primitive or slow brains. Some can be vicious cannibals like the Laistrygonian Giants that encountered Percy Jackson from books 2-5, while others can be quite peaceful unless they're fooled into working for Kronos like the Hyperborean Giants in the Last Olympian.

Noteworthy Giants:

Marrow Sucker (Laistrygonian)

Skull Eater (Laistrygonian)

Joe Bob (Laistrygonian)

Morrain (Hyperborean)