Thanks to you all :-D
Soy and Foxy are very well adjusted to new environment, they got along very well, groom each other... and they are so different in personalities
Soy is almost like a dog to us, he just love human; he doesn't mind if we ignore him for a while or something; he is always happy and worry nothing. Foxy is different, she is more bossy and sensitive, if you ignore her, she won't give you a good face afterward! :-D She would ignore you, doesn't allow you to pet her for a long while. We just have to be the servant and spoil her!
By the way, Foxy has this weird temper in the nap time. Yesterday she was sleeping on the sofa near me, Soy wasn't so sleepy so he got near her and waked her up (sort of like a soft bite or something, I didn't see it). You didn't see Foxy's face, she looked right into my eyes and meow meow meow, a LOT to say about her naughty brother. Like complain or protest (Why didn't you stop him! It's annoying!!), I tried to pet her but she just meow to my face more then jump to the other side of me and lied down.
She's just... so like human :-)