alleyne x nowa is almost COMPLETELY canon now <3 if you watch Queen's Blade: Utsukushiki Toushi-tachi Episode 2, it hints a lot that alleyne likes nowa. plus, if u watch through the ending, you see alleyne and nowa ready to kiss. unfortunately, they cut it off right where they almost do kiss..:c
The actual episode didn't hint even remotely at them being gay. Besides, the anime is lower canon. It conflicts with the official storylines fairly robustly.