Personally, I tend to start out from an appreciation of canon relationships, or relationships that seem likely in canon, and then branch out into slash and other unlikely scenarios. (Although slash with Milly and Nina is canon in this show, but I digress.)
I think Kallen got some development relatively early in the show when we were given glimpses of her strengths and weaknesses, and then again in Stage 9 when we saw her motivation, but since then she's been relegated to "token ass-kicker" aside from a few scenes about her feelings for Zero. I'd like to see more about her actually doing stuff, yes, but I'm willing to wait--the show does have a lot of ground to cover, and at the moment it seems to be focusing on some Black Knight politics and the Lelouch/Shirley plot.
(no subject)
I think Kallen got some development relatively early in the show when we were given glimpses of her strengths and weaknesses, and then again in Stage 9 when we saw her motivation, but since then she's been relegated to "token ass-kicker" aside from a few scenes about her feelings for Zero. I'd like to see more about her actually doing stuff, yes, but I'm willing to wait--the show does have a lot of ground to cover, and at the moment it seems to be focusing on some Black Knight politics and the Lelouch/Shirley plot.