u/Past-Dimension423

My dad and I are building out my house, so forgive me in advance for not being technical as I’m learning! we’ve got this weird area that needs to be sealed off. The blue in the top part of the photo is soffit. We were thinking of building a small frame with 2x4s and adding metal roofing where I’ve drawn the triangle but are there any other ideas for this area? It’s protected by the overhang so good for weather, just want to be sure of bugs and small critters making their way in the house! TYIA