It's unclear if Ella Irwin still works at Twitter, but giving everything going on I strongly suspect there's no one to moderate against Elon personally banning an account he does not like.
My understanding is that the 'Trust and Safety Council' was an international board of external stakeholders and consultants to help with 'Trust and Safety' (moderation) at Twitter, NOT the 'Trust and Safety' division within Twitter.
She just got the role, why would she no longer work there? Presumably she was put there to enable this, after Yoel Roth abruptly left (and was subsequently defamed as a pedo by Elon, what's with the guy and pedophiles).
I don’t mean to be a antagonistic but as the owner of twitter why would we expect he not have the right and ability to ban anyone he likes? When it was publicly held there was some accountability to the shareholders as part of the public. Now he can literally carry a sink around wherever he wants