Flashing Blade Anna?

Don't see why it wouldn't work, especially if you refine her weapon for speed and have someone on her team give her something like Hone/Drive Spd buff.

Fury is great here. Extra res for the ploy, extra atk and speed, def because her opponents are often going to target it and hers isn't especially good.

My Anna already has a slaying axe and fury so I might even do this with iceberg or glacies. Hesitant to give her a spd ploy though. Hard skill to come by and I want to keep one Saias.

To sum it up: I like it!

I honesty think she should be support with dual rally, fient, spur, spur seal. However, to work with Flashing Blade and being offensive why not give her a Bond in her A Slot? Her specialty is mobility, particularly adjacent to allies.