This is a fun manga, but if Kanako was a real person, I would be terrified. Sure, the people she kills are always less than pleasant, but she always kills on a whim. Her mood swings make her pretty scary since she is fairly unpredictable as a result. I would like to believe that everyone she has...
Phoenix Man was an extremely tough opponent, so I think Child Emperor did very well in his fight against him. I wonder which other heroes could have beaten Phoenix Man in a 1V1. Besides Tatsumaki, Saitama and Blast.
I think it wouldn't be too hard for him to save his job if he was given a chance to demonstrate. (If the reason he was booted was because they didn't think he did anything.) He could have made two party members spar and debuff one side to show how annoying debuffs are. But oh well. I guess it is...