[Were he to use the term, Ochako would understand immediately what he meant. She's from the modern age back in Japan, of all things, so it'd make the most sense to young girl like Ochako. Still, she frowns a bit as she tries to digest the real meaning of what her acquaintance here just said.]

Mmh...so he's only really interested in you, then? It makes sense, he seemed very 'concerned' to hear about you, or know where you were... [Taking a moment to hum to herself, thoughtfully, Ochako straightens her back up decisively and huffs.] But you know!! If he really does try anything to hurt you, Gershom-san, you can call on me anytime and I'll race right over to help! Me or my friend, I'm sure!! It's our duty as heroes to protect people from harm, no matter what, and we'll definitely do it to help you from someone creepy like that!

Plus Ultra!!