Seasoning Tuna Casserole

I'm making Tuna Casserole using Tuna, frozen peas, and Great Value box Mac and cheese that's more cheesy (the basic Mac and cheese that has the powder cheese I think). I'm wondering if I should season my tuna before I put it in the Mac and cheese and peas? I've never made tuna casserole before. The seasonings that I have are garlic powder, onion powder, salt, and pepper as well as Texas Pete hot sauce and Sriracha (I might add spice, we'll see).