I haven't drawn Ayaka much lately, and since there isn't much information about Ayaka, i want to tell a bit about her in a condensed version.
(After all it will be shown in the next chapters of Mechas Heart in a way more detailed version)
Many of you know that Ayaka dislike Yoshitaka aka Thurosis. But actually she hate humans in general, but later on she found her reasons not to hate every single human being.
This would be an entire other story so i come go back to theme which have something to do with the upper picture
As everyone can see above, she is in a bad shape (of course, this wasn't Yoshitakas deed) and she used a lot to look like that, because she was created to be an combat android.
(Yes she wasn't created by Yoshitaka hands) Back then Ayaka was a prototype for the military, every field-testings and mock battles were successful until other new models came. Those new models are clearly in advantage and overwhelmed her, because those new combat androids are technological more advanced and their combat patterns are based on those from Ayakas'. She had no chance and couldn't defeat them several times in rough on mock battles. So became useless for the military and the high-brass decided to scrap her and the project. (Parallel to Ayaka the military wanted to create an infiltration model (Miaka), but through some political ruckus/troubles, they just created the base A.I.)
On that day, where she should be scrapped, they just wanted to through her into a waste press, but instead of letting them destroy her, she successfully fled and submerge inside the human society.