Just took a peep at your Rider..... I hardly ever comment on other peoples work because.... well just because.....
However I just wanted to make a few points and I hope they will be seen as constructive. Advice more than direction. The reason I'm bothering is because I think its a great image.
First of all its so strong of a decorative style, that you may be forced to apply it to all cards in order that the deck has an overall visual consistency, and it may prove difficult on some of the cards......
Secondly, my initial impression (and forgive me if I misintepreted it) but it appears to be a female or at least a very feminine face. Was this your intent. If it was, then kudos to you and welcome to the club
, but if not, you might wish to make some adjustments.
Third. The bird the rider has on her/his wrist would appear to be a hunting bird of prey. Thats perfectly suited to the character, but may raise some distracting questions for a reader of what is its significance (if indeed its intended to have one) in the context of the the Rider cards principal role as a deliverer of messages).
From my perspective its interesting and attractive enough of design as is, but based on my experience I wouldn't be surprised if you would be questioned and possibly challenged on such points... But as I say, I think its charming....