That character (U+E0B0) is not a valid Unicode character. Or more exactly, it's in the private use section in Unicode, so you can use it for your own use.

In the example usage section, that Wikipedia article mentions:

Powerline, a status line plugin for vim, use U+E0A0–U+E0A2 and U+E0B0–U+E0B3 for extra box-drawing characters.

Which leads us to https://github.com/Lokaltog/vim-powerline

Which gives instructions on how to patch your fonts to add glyphs for those Unicode point codes.

That character (U+E0B0) is not a valid Unicode character. Or more exactly, it's in the private use section in Unicode, so you can use it for your own use.

In the example usage section, that Wikipedia article mentions:

Powerline, a status line plugin for vim, use U+E0A0–U+E0A2 and U+E0B0–U+E0B3 for extra box-drawing characters.

Which leads us to https://github.com/powerline/powerline

Which gives instructions on how to install fonts for those Unicode point codes.