Any self-respecting Assassin would be able to cross three feet in no time at all!
Right now, Annie was a mere three feet away from Eugene.
In other words, Eugene would have no time whatsoever to react to her ambush. She would be killed in an instant!
Eugene was ecstatic upon seeing the massive meteorite decimate the entire human army in Orida Fortress. However, the ecstasy she was feeling was soon followed by surprise, which then gave way to frustration. After centuries of running rampant throughout the realm, why did things stop going my way only recently?
If this body were to be destroyed, she would have to look for a replacement.
However, no matter how fast her Assassin was, Eugene's situation was not completely hopeless. Rescue came in the form of the Naga Priestess Molina.
A few hundred feet away, Molina had noticed Princess Annie's presence sooner than Eugene did.