I see absolutely no issue with Galatea joining the 7. Tabitha uses nearly exactly the same techniques in sensing her opponents, and she uses zero Yoki just like the other 7. In that same way, the only reason Galatea could be found at all was because Miata never uses Yoki, she instinctually finds her opponents. She functions and fights by sensing Yoki, but the only technique
requiring her to use a little Yoki is the "nudge" she used against Duff. However, that usually only works on the lowest denominator (or in Duff's case, the dumbest) of Awakened Beings and regular Yoma. Agatha thwarted the ability fairly easily. Tabitha is good, but even she can't compare to the God Eye. Galatea would be welcomed into the 7, she just wouldn't be able to know that any of them are there
