[@Banana] You directly disobeyed orders, and failed, and you're expecting a cookie?

Artoria, on the other hand, was trying to follow her orders, and failed*.

*maybe. She's in the PERFECT set up to get to steal Ira's powers. And having two Ira's is a pretty nice power spike on the battlefield. Especially when one of them isn't nice enough to let you charge up a x1000 strength attack.