Agree with everybody that you need more depth. That's not really your question.
It won't look like a box, really, if you put something into the space by the door. It could be a nice place for an arm chair with a small table and reading lamp, for putting on shoes or checking your phone while partner freshens up. You could also put a large dresser there to hold your folded clothes, taking some pressure off the closet that way too, with a mirror over it. As long as you do something intentional with the space, nobody will think anything about the turn. As a last resort, you could put a shallower linen closet there or a bookcase...
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