That's just a design on what I think he would look like as Bryan didn't decide so I think he would have made changes if he had stayed in the animatronic body. This would only happen if Steve wasn't created when moltan was trying to save Bryan or someone found a way to separate them without harming them. But I think it's more likely Steve just wasn't created to begin with.
I think Bryan would have gaps in his memories as a result of the way he died ,organ failure, I think that would have some after effects such as memory loss. I think that would carry on when he's an animatronic so he'd just randomly forget things or days. Because of this I think moltan would be consistently with bryan to make sure he was alright. Also I think Bryan would start journaling things but would forget to write things down so it was mostly useless.
I think loud noises would scare Bryan that's why he has ear muffs on. I think he'd be scared of a lot of things but feel safe around moltan because of how long they've known each other (NOT A SHIP IN ANY WAY)
I think Bryan would like being around baby and blora as they went through a similar experience to him in being turned into an anmitronics and ofc rock star freddy. I also think he'd carry a Ned bear plushie with him, for no reason.
I think Bryan would change his outfit pusificly all the purple as it reminds him of afton. So he replaces it with red. He'd also style his hair in a way to try and cover up his rotting skin but isn't very successful so baby has fun trying to style his hair in different ways to cover it up. I think Bryan would keep some of the stars in the design as I think he'd like them. I think Bryan would make the suit into more of a jacket by unbuttoning it to feel more comfortable as he cant find his old jacket and it's probably ruined cuz of all the blood.
I think for the majority of the time Bryan would stay in the in the theme park and the glam rocks would visit him sometimes. I think pat would visit a bit more as he sympathies with how Bryan feels and wants to help as much as he can. Sometimes I think Bryan would visit star mall but I think it would confuse him as when he was alive star mall was still in development.
I think him and Davis would speak a lot and Davis would bring books for Bryan to read so he didn't get bored and give him updates on how the world was as I don't think Bryan would look on the internet much. I also think otco would visit every now and again and maybe derpy, I don't have a reason I just think it would be nice.
I think Bryan would have frequent panic attacks aspeshuly when he forgets things or isn't around moltan, or when glitchtrap and afton are mentioned.
I don't think Bryan would like being turned off as he'd find it weird and uncomfortable. So moltan would try and find a way for him to charge while being awake.
Over time I think Bryan would carm down and be fine being on his own but still be very reliant on moltan.
I think this is a fun concept let me know if you want to see more of anmitronic Bryan!