Been thinking about how (non-birdcaged) Marquis would be protective of Amy, but I don't think he would insulate her from the cape life as well as he could. He genuinely cares about her, but he allows her to be put in potential danger - being present at fights to heal, going around Brockton Bay without an (obvious) escort, etc. He tells himself it's because he's confident in his reputation's ability to protect her, that he's letting her be free, that the cape rules put her off limits and the like. But deep down he hopes that someone will try going after her because the narrative framing of being "the father protecting his daughter" justifies a level of overt violence and cruelty in his response that his personal code wouldn't normally permit.
We see a bit of this in Worm, in Teneral e.5:
We don't see Marquis threaten anyone else like this in his entire written existence (citation needed) and it gives us a bit of insight into how he thinks about Amelia: he loves and values her, but a not insignificant way in which he values her is as a legitimizing factor for his own violence. She's an asterisk in the terms of his moral code, a socially acceptable reason to let the mask slip.
