You wouldn't be far off calling Fervent the sans serif version of Badinage. As I was designing the unadorned alternate uppercase forms for Badinage I began to see the possibilities of translating them in a sans serif family. I borrowed some lowercase details from that connecting script to help inform Fervent's design, notably the epsilon-like lowercase e and the shapes of the a, n, m and k lowercase forms.
The upright forms borrow heavily from italic shapes giving the roman a sense of motion. Alternate versions of the a, e, g, r and s give design many different personalities. Again I've included support for Vietnamese and there are lots of the OpenType features that are becoming standard for the fonts that I design.
Fervent is brimming with personality, and may, quite possibly, be beyond any sans serif category. It works equally well in text as you would expect it to in display. I hope you find it useful.