I guess it makes sense that Puar and Upa opted out. I was surprised to see them fight in the first place! I should go back to reading the original alongside the SD volumes. And thanks for pointing out the subtext of 助かります, I think that confirms your interpretation of the events.
I dug around a bit and found this reference:
That might fit with the context? It says it’s a feminine expression though… but I do sometimes wonder how rigid those classifications of ‘male/female speech’ actually are 
Your mention of つきおった being a compound verb made me wonder if 弱点をつく is a fixed expression, and that seems to be the case! Different kanji though:


This is my first time reading this franchise so I was shook to see the surprise! Can’t wait to dive in in a few days 





