I've worked with gps and twouter before at Google; they were two of the leaders of the python ecosystem. twouter is a highly technically skilled contributor- when I found a 2 bugs in the Python runtime, he was the person who helped me fix them (bug 1: RPC calls from C++ to Python delivered during interpreter shutdown caused crash, bug 2: importing the same library twice with two different names caused crash) upstream.
gps apparently is a core contributor to cpython but I he did mainly administrative work afaict when I was at Google. From what I can tell, gps is the primary instigator in this incident.
Barry Warsaw: was lead maintainer of jython, I think also involved in the guts of cpython for some time.
Emily Morehouse: I hadn't heard of her before but it looks like she is a core python developer: https://emilyemorehouse.com/blog/015-my-path-to-becoming-a-p... who implemented some key PEPs.