Will you require anything? vs. Do you need anything?

In a comic book I’m reading, a wife asks to her husband, who’s working late in his study, “Will you require anything?”

  1. Why does she use “will” instead of “do”?
  2. Is there any difference in a vibe between “require” and “need” in that situation?

Solution 1:

"Will" here implies "now, or going forward". "Require" is more formal in tone. Overall, "Will you require..." marks a master-servant relationship. It's something a butler might ask.