A vampire. It explains the large clothing, too. All to cover up as much as possible.
The mention of sunlight already got her making a face. And this was the form Seina planned on taking around the outside world. Silly.
"In that case, you will provide a proper escort that involves the least —
▀▄▀ .𝙴𝚇𝙴 ▄▀▄
|She was ever so slightly shorter than Seina. The top of one of the twintails reached her chin. Short, but not by a lot|
"Her name's Rachel Rachel Alucard. She's a vampire that doesn't get hurt by the sun. She just doesnt' like it, hence the brella."
|Of course she wouldn't KILL HIM.|
𝙎𝙚𝙞𝙣𝙖 𝙈𝙪𝙠𝙤𝙝𝙖𝙧𝙖
— the feline theming. As it turns out, it's still, in fact, Caturday.
"H-Hey, who exactly is this, anyway?"