Yay another Xena fan!
Yeah let me just get at least one cool picture of her in here

Yeah the raven black hair and everything just fits together so well, she was a lot of fun. 
Well, I'm unaware of any suggestion she was actually gay. But yes she was her own person and held onto her femininity, dying her hair, making scarves, turning up to parade with a fluffy collar made from the inside of her boots, supposedly having a rose painted on her fighter.
Shooting down an unarmed artillery observation balloon by attacking it from behind enemy lines possibly disqualifies you from counting as knightly as well.
Well in consideration of the fact that there isn't really ample evidence to identiy anyone as anything, and to include people who just seemed like they tend to or likely would express their sexual desires in particular ways, and to include people who might tend to express the possibility of them even ultimately get married or having a boyfriend (believe she expressed interest in having a BF at one point), it seemed logical to place her as someone likely to (particularly in a current era) at least in some way at some point gravitate towards sexual expression of some kind of gay/bisexual/KISA kind, at least, as I said, at one point or another, perhaps in conjunction with other things.
Like there are like youtube personalities who like go and say "I'm gay" and I'm like... you sure don't seem like you express yourself in a very gay way, and then there are those like Dumbledore where what they do exactly sexually never comes up but you always get the sense that they're at least somewhat different in how they approach this area of their life. It's much better to just go with how you instinctually view someone or feel from them, rather than attach too much value to whether or not we have like photographs of them doing certain things.
Or take Sera from DA:I, Sera from DA:I isn't expressing her same sex interests like Dumbledore, she's more of reckless kind of typical high carnal girl who limits her sexual activity to repeated sex with the opposite sex or at least a large amount of sex with lots of members of the opposing sex. The same sex expression is more like just to prove she is cool enough to kiss and to make her BF think she's edgy or something, but it's not like the more concerted and relaxed form of gay expression you would possibly find in Dumbledore, or (likely it seems) to be mixed in with the stronger sense of justice with Lydia.
The biggest issue I noticed was she was fighting on the side of Russia during WW2 which just wasn't going to end well.... because, well, actually nothing really ended well for pretty much anyone fighting on any side in WW2.