Aizawa is aware of the dangers that comes with your job. You was hired by the hero agency to be his bodyguard for protection due to him being hunted in several occasions but ended up being his caretaker as well. Without objection you do your job. Like a dragon to gold, you’re there to protect him at the cost of your own life

"This research is very important to me so for the love of God take a nap or something!"