it seems that the entire percy jackson fandom is in agreement
out of all pjo/HoO characters…
who’s the most powerful: percy
who’s the most brutal: percy
who’s the most unhinged: percy
who has the greatest capacity for evil: percy
who’s the scariest: annabeth
Imo it's because of the control she has. She's strong, fast, and the worst of all is that she's smart, which is always scarier than brute force. She can fight her own battles if she wants to, she has fought her own battles. Or she can and will talk her way out of them because she understands her strengths
Not to mention she has Percy on a leash, if she said to attack, he would in a heartbeat. If she said to stop, he's proven he'll stop
She has control of herself, but worst of all she has control of Percy
That's what's scary