He opened his mouth. Then he closed it. Then he opened it again. Typical surprised reaction from Tyr, "Sif." He offered a small but genuine smile before reaching over to pull her into a big (awkward) hug. Not the demonstrative type, but this was a special occasion, "When did you get back?" Here. Something.
Then again he hadn't been so much in touch with Thor to know if Sif had been around. It almost felt ominous with all the Norse popping their heads in.
"It's good to see you, Thor around?" And then Tyr was again- all about business.