That's an excellent photograph of one of the sexiest women (and best cosplayers) on the planet. Perfectly lit, great contrast bringing out all the colours so richly. Yaya always looks great because she's gorgeous and knows what she's doing, but a good photographer makes the costume look great too, and frames the pose to best effect. You've done both superbly.
I've seen hundreds of photos of Yaya and I don't need excuses to look at her cleavage, she flaunts it at every opportunity (God bless her)! I've certainly never found her breasts disturbing! Hypnotic, maybe... LOL!
I wanted to compliment the photographer, because it's easy to forget the importance of their skill (and the the better the costume and the more attractive the model the easier that can be) until you see a good cosplay spoiled by poor photography.
I don't think having a different figure as a character is a reason not to cosplay them. It's an argument against casting them in a film (in the unlikely event the producers stick to the original look), but in cosplay costume quality is more important. No one's eyes are as big as manga characters', for example, but no one criticises cosplayers for not wearing huge fake eyes. And they're images subject to change anyway. Should busty cosplayers who used to dress as Lara Croft not cosplay her new, reduced cup-size version? Should girls not be "allowed" to do fem versions of male characters, or white kids dress as asian characters, or big girls dress as petite characters and enjoy dressing up as their heroes? Yaya makes great quality costumes and is a great model. I could look at 99% of the rest of the internet if I was just interested in seeing breasts.