Ranger was created with nearly only negative personality traits and was initially devoid of any empathy or kindness. He has a strong inferiority complex toward humans which leads him to act with sadistic glee at their despair. He pretends like he treats humans dismissively, but in truth he pays a lot of attention to towards them; Going as far as collecting clothing from dead participants to wear for himself.  He usually calls participants 'bastards.'

Ranger's original Japanese name, "トト・ノエル, Toto Noeru" is a pun on 整える,' Totonoeru' literally means "to arrange; to put in order." VGperson named him 'Rio Ranger' in their translation to make up for the pun; as in 'rearranger.'