Montana (Sebastian Terwilliger -- some sources give his first name as "Monty", but it seems to be a nickname) is a Whateley student. He looks like Bigfoot might. He's 7'6", has long arms and blonde fur.
He got rather badly savaged by Tansy Walcutt his freshman year, and consequently has a lot of animosity for women in general and pretty ones in particular. This animosity led to his taking actions which cost Tennyo her job, followed by Chaka challenging him to a duel. He was at a particularly low point at the end of his fight with Chaka, resulting in his blindsiding her after the fight was concluded; part of his penance for that is to tell people about the fight and what he did. His self-perception and overall worldview have been improving since Thuban intervened.