It's hard to tell from the last name. But it says on her Icenetwork Profile "Parents are Miyung Hong and Yong Hwa Hong" -- these sound more like Korean names.
I think she might as well go for it at the senior level next year. She has the right profile for someone like Frank Carroll to lead her to a breakout Olympic year. After all, Frank Carroll did an amazing job with both Mirai Nagasu and Gracie Gold at the last two Olympics, after a relatively short time. It would in any case very hard for her to make a splash at the crowded junior level, with all these amazing Russian and Japanese girls, and so few U.S. JGP spots.
It will be much harder for Tessa to have a break out season like Mirai or Gracie. When they went to Frank they already has impressive resumes. Both of them won Jr nationals. Both of them won silver at JW. Mirai had already won a national title. Gracie placed silver at nationala the year before. They already had spots at the GP. Tessa has none of that. She has no international medals nor any junior or senior medals. She has promise but without results it will be impossible to get the USOC to pick her or more accomplished ladies.