Disney+ is officially up and running, which means the countdown has begun until live-action Marvel series start popping up next to The Mandalorian, older animated classics, and the seven episodes of Gargoyles I've been watching on repeat since Tuesday. Arguably the most anticipated and most shrouded in secrets is Loki, the show from writer Michael Waldron (Rick & Morty) and director Kate Herron (Sex Education) that will see Tom Hiddleston reprising his much-beloved god of mischief role. Now, finally, we know someone else who will be taking that journey with him: Variety reports that Sophia Di Martino (…