| Well, thank you for inviting me!
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Doctor Who+Phineas and Ferb+Percy Jackson are the crossover things.
Adyson is a regular traveler with the Doctor after the first 5-ish episodes, and is in the middle of math courses with Baljeet. With Fireside Girl meetings, you can imagine how stressful this is.
Sometimes there are other companions of the Doctor, but Adyson is the main one for this series. (Ok, maybe this isn't as planned as planned, but I'll work on it later.)