Weird 1.5 bathroom (HELP)

[Sean Steele]

I recently closed on a house and I have this weird 1.5 bathroom upstairs. The bathroom connects to the master and the hallway.

My question is any idea on how to make this look most presentable/functional. My goal here is to BRRR this property and then live in it. Should I close off the door to the master and just make it a upstairs bathroom?

So weird to me its done like this...

(That is not a mirror on the left, that is the door to the master)

Zillow link: https://www.zillow.com/homes/1...

[Marian Smith]

I have a condo that was like that because it was on the second floor and both bedrooms could use the bathroom.  We closed off the master access but all the other condo owners left it as is.  We thought a single door would work better for roommates.  Not weird at the time it was built.  You see it all the time in 70's buildings.