This is the thing. I’m very similar
I don’t go into situations wanting to be the ‘protector’ or ‘mamma bear’, but if I see injustice I can’t help but stand up to it.
Like you, admittedly I don’t usually get all shouty (depends on how much wine I’ve had to be fair 😂), but I absolutely will stand my ground, be brutally direct and stick up for the person I think is being unfairly treated.
I don’t like confrontation, but I absolutely won’t shy away from it, if I feel strongly about something.