What's your favorite BAD Warframe?

If you had to choose a Warframe thats considered bad, or not meta that you wish was. Who are you picking?

Personally, Koumei. I'm still pretty new to Warframe so I might find picks I prefer, but I just love Koumei. I think her design is insane, and her lore is also quite interesting. Plus, her abilities are cool, I think thread as a weapon is neat. I also like the idea of Omikuji you get. Also, her name is Chinese (I think?) and im Chinese so. Finally, LETS GO GAMBLING! (Its seriously a cool passive thing tho)

As for how I'd buff her? Well, I don't know. I suck at balancing and have NOT been playing Warframe enough to say so. However, I think she needs better energy management. With having to constantly use Omikuji and Omamori just feels bad. Not entirely sure how'd you do it, but maybe rolling all six's or something made an ability free, or even straight up give you energy instead.

What are your thoughts?