Two above are chocobo, a fictional bird character appeared on Final Fantasy VII, not exactly a fan art, never good at those. Just my imagination about those birds.
The doll girl. My lovely one. Have a storyline on this character, a really good one (I keep in the depth of my mind.).
Try adopting things that are Japanese into characters, firstly, the samurai.The heroic Yagyu, standing tall on top of piles of other samurai spirits.
After the Yagyu guy, is a representation of a strong warrior, which I think resembles Magneto from the X-Men comics. And the last one, is a caricature (or so I said) of my friend here in Japan, Giulio-san, a.k.a The Italian Stallion.