The collar, Wendy will never willing put on her neck again nor will she willing return to slavery within the city. The only time she'll wear the collar willing is on her head, as a focus for her power [b] to defeat the Luminous Knights with. Bwa Ha Ha. [/b] The key term though is willingly, though it would be extremely ungrateful, inhuman, and dishonorable to capture someone who just saved your life. (She would keep the bow towards you just in case.)