[ Lacus is not actually apalled by the sitting position, at least. She doesn't actually sit in seiza either, her legs are going to the left side instead.

Doritos and tea though...... No, she's not convinced. ANYWAY.

She feels far less tense now, though she knows better than to let herself stop treading carefully. ]

It's not? I think sharing some tea is a good way to get to know one another, so I'd at least call it a key component.