[@Sakaki Chizuru]
Well, thankfully, there's the option of either King Scary or another Knight of the Swan (who isn't feeling very swan-y at the moment) among the English Servants left to be paired, right? Since the Once and Forever King is taken already, as long as [@Idol Theory] is still good with it.

Also, to my understanding, Saber, Archer, Caster, and Shielder are taken with the rest being alone for the time being. It's a good time to pick someone before there's not any other options left.

Anyway, I would really be interested in Alex and Charlie knowing one another, since Alex doesn't make much secrecy about what she does. She's very open for a mage since she doesn't have a big deep foundation to preserve. Finding someone with similar traits would be very interesting for her. Knowing that she has been researching Mystic Eyes and even trying to snag a spare invitation to Rail Zeppelin isn't that hard indeed so Charlie could be aware of Alex's interest in Fairy Eyes.