Millie Bobby Brown actually has (or had) this going on due to her filming Stranger Things during formative years. It's really fascinating to listen to this weird halfway point between the two. You can hear it well here: https://youtu.be/xhjooxtYf9Q?t=50
A particularly interesting point is around ~1:10 where she's been largely using her American accent, but she uses the word after, but instead of starting the word with the TRAP vowel we would expect, she uses the BATH vowel instead owing to her original British accent. But I think what's even more interesting is that when she does this, it doesn't sound like she swapped back to her British accent for a single word - it sounds much more like someone with a general American accent doing an impression of a British person saying the word after!
Pretty hype. The other digimon story games are pretty strong as far as the franchise is concerned, so I expect this one to be of similar quality. And with a title like Time Stranger I think there's a lot of crwative possibilities with this one.