In the film, scientists invaded the Creature's peaceable kingdom; so naturally he saw them off.
peaceable━━ a. 平和な［を好む］; 穏やかな.
peace・a・bly ad. 平和に, 穏やかに.
see sb/sth off phrasal verb [M] INFORMAL
to defeat someone or something, or to deal with them effectively so that they can no longer cause harm:
England saw off Luxembourg 5-0.
He may not have seen off the challengers for the leadership of the party, but he has at least silenced them for a while.