Seed00 said:
Not many people will respond well to an OC, but even OC's can be well written.
And with so many sekirei out there, (the few we've seen though), can still be winged by Ichigo.
As for a crazy idea: Ichigo wings Karasuba, Sekirei 04. The tension that would occur between her and Miya would be of epic proportions.
Considering that she should already be winged, Ichigo would need to get either Orihime or Urahara to un-wing her so that he could re-wing her, and I really doubt that'd happen, given her personality.
Now, if, say, she ran into Zaraki Kenpachi, got into a fight with him, and wistfully said something like "I wish my ashikibi was half as manly as you", followed by a trip to Urahara, that's something I could see happening (though depending on what happened with the original now-dead Yachiru that the current Yachiru is named after, he may not be interested in women at all).