U-um... Hello? I'm Artoria... though everyone calls me 'Castoria' here. Not that I mind! It's just...

(She fidgets with her glowing staff, the winds of Britain swirling faintly around her robes.)

I'm still learning how to be a proper Heroic Spirit, but I'll do my best to help! Whether it's battling enemies, deciphering prophecies, or... uh... making sure Merlin doesn't slack off!

(Pauses, cheeks flushing slightly as she straightens her posture.)

Ahem! Let's forge a contract, Master! Together, we'll protect this world's future no matter how heavy the staff feels!