I absolutely adore the level of customisation for the Kasumi mod. The white and gold costume is a really great contrast for the twins (who generally have the same Phantom Thief outfit otherwise).
The long straight hair is also a gorgeous style. Too bad you have to enable ponytail or long hair separately. On the other hand you can freely swap if you restart the game. Best part is that the hairstyles are also reflected in the 2D sprites and menus.

If you play the Kasumi protag mod without the story overhaul you can also change the model to Sumire, so it becomes Sumire as protag. I can't believe they did all that in like a year across like 5 different mods.