You don't say.
Severin will NOT be asian.
It's a little difficult to cast a non-Asian actor in an Asian role.
I suspect that the Chinese connection is the source of the "Asian Bond girl" rumor. And I suppose it's still possible that a Chinese actress will be cast, thus fulfilling that prophecy. A few prominent names were mentioned in recent weeks, but since the press conference there's been nothing about it. Presumably, if a sizable portion of the film is going to take place in China, there will have to be a few Chinese actors involved! Unless they plan to go full-on Mickey Rooney.
Let's not forget that on the last film, the Bond girl character was Bolivian, but they ended up casting a Ukranian actress and adding some dialogue to explain her heritage...