Despite his eccentric behavior, Brook is an extremely upright and compassionate person befitting of a true gentleman as Brook utterly disdains wickedness and cruelty. When Zeo began to ruthlessly assault his own men, Brook even defended one of the enemies from Zeo's attack, reprimanding Zeo for his cruelty. Brook's compassion is shown in Zou where he was horrified by the immense devastation the Beasts Pirates caused. He readily helped the badly injured minks along with his crew mates.