Seraphiel's unsaid question was answered when I brought a specific artifact out of my pocked dimension and imbued my mana into a little crystal.
It didn't take long for the communication line to be established.
A high-pitched, girly voice came from the device.
"Hello, Princess Felicity Valorian speaking."
"This is Black, we met earlier today at the auction."
"Lord Black!! I didn't dare hope you would call me so soon!" she chirped merrily.
"Is it a good time to call? It's pretty late, did your bedtime not arrive yet?"
"I'm a big girl who can stay up for as long as I want!" She decreed proudly before adding with a low whisper; "At least, as long as my studies don't suffer for it…"
"Haha! Is that so? What's your favorite subject?"
"Magic theory! It's because instead of a boring tutor, it's Mom who is my instructor."