Does she stay in the Churchill, or does she go and takes a cue from Arisu and gets the Centurion?
Interestingly enough, while it's implied that St. Glorianna COULD very well buy late-war tanks like the Cent (the school is well-funded by alumni donations and other sponsors), supplements show that their arsenal is actually pretty limited -- heck, officially they only have one Cromwell (which apparently Darjeeling had been trying to convert into a Challenger, but she kept on getting shot down by the school's board of trustees).