Notes:

DeFACT0's theory:

SCP-053 is based around the human nature of caring for a baby and turning that notion upside-down. With SCP-682's adaptability to any harm, it is possible that his defense mechanism against 053 is to be put in an docile state as hurting her will only lead to harming himself.

And then there is the interview found on YouTube. It is probably not canon but content does divulge a bit on 682's opinion on 053. The video is well done, but jump to 7:54 for his bit on 053.