Azula was having one of her bad days. The kind where she kept looking over her shoulder, positive someone was sneaking up on her to kill her.

She had fled the Air temple no longer feeling safe there even if she knew she had to return. Had she ever really felt safe there? That was debatable.

So when she ducked into the sensorium in an attempt to shake off her invisible pursuers she wasn't pleased to find herself staring down a massive robot. She'd gotten quiet enough of them from the attack.