Train Ninjas gives the pets Danger Sense, or Hide for the Jounin. When slotted with defense enhancements, only the Oni gains more defense when upgraded. The Genin and Jounin have the same defense with 0 defense enhancements slotted and 3 defense SOs slotted. When inspecting the details on Train Ninjas, it shows the modified defense values from having defense slotted, but inspecting the pets show the base values.