OH BOY THIS WILL BE LONG !

In game Informations :

Affiliation ;                        Freddy Fazbear's       
                                            Mega Pizzaplex

Occupation ;                     Security guard

In game Description :

Species ;                            Human

Skin Color ;                      Sickly pale

Hair color ;                       Brown and red

Eye color ;                         Orange

Gender ;                             Agender

Appearances  ;

First appearance ;           Five Nights at Freddy's     
                                            Pizzeria Simulator
                                            Five Nights at Freddy's       
                                            Security Breach

"You don't have to think much about this, but go ahead, set your heart ablaze, and show this world how strong you are."

Miyuki.Shiro is a security guard who appear in Five Nights at Freddy's: Security Breach and in Pizzeria Simulator.

PHYSICAL APPEARANCE

Miyuki is an afab with very pale skin, almost sickly so, orange eyes that shines in the dark, red lips, and long brown fading to red hair. They appear to wear a clear blue security guard uniform with darker shoulder pads, looking like the one Vanessa is wearing. On their dark belt can be seen a brown and red colored katana, no doubt to fight off any intruder, not to forget the dark pants and shoes.
They are also described as having a very kind smile, one that can relax anyone.

PERSONALITY
Miyuki is shown having a very easy going, calm, and very mother like personality, not only caring about keeping Gregory safe from Vanessa, Vanny and other animatronics, but simultaneously caring for the animatronics as well, especially when they gently scolded Glamrock Freddy for being out of his room after the show, and that he even worried them.

But, their job is also important ; they think their job is not only keeping the pizzeria safe, but mostly helping, caring, and protecting its inhabitants.
They appear to be very dutiful, and not taking anything lightly, going as far as staying for a bit with Gregory before leaving so Vanessa doesn't suspect anything.

From severals notes found ; it appears Miyuki has a sweet spot for cats, giving away any left overs to them, and also has a sweet spot for children; not only for caring about their siblings, but also by coming during daytime to stay in the daycare, helping Sun taking care of them, and protecting the children when Moon takes control.
Although for mysterious phenomenons, Moon seems to be terrified of Miyuki and stays away, which is an advantage for Gregory when the lights go out.

They are a very kind hearted, and gentle 19 years old, ready to completely give up their life to save another.

SPECULATIONS

•Considering Miyuki used to work at the previous pizzeria before it was burned, it is highly suspected they got hired so they keep their mouth shut about what they know.
•They are also highly suspected of the last appearance from The Blob at the end of one of the endings.
•Miyuki might be able to see dead people, seeing as it is impossible for them to know this much about every pizzeria, and knowing Vanessa is a potential danger without any visible clues.

TRIVIA

•Miyuki is the oldest out of 5 siblings, their parents are dead.
•They have bad burns on their left side because of the fire from the former pizzeria.
•Their favorite animatronics are Happy Frog, Mr.Hippo, Orville Elephant, Moon and Sun.
•Miyuki adopts Gregory in one of the secret endings.
•Miyuki is extremely skilled with their Katana, being able to cut a gun bullet shot at them.
•They have lung cancer, but tries their best to hide it, as to not worry anyone.
•They are a huge fan of the Pokémon franchise, can be seen with a gameboy in their pocket.
•They have about 8 times the muscle density of a normal adult.
*Which is quite convenient as a night
guard and swordsman.
*They are considered as about the same
strength if not more as Montgomery
Gator.
•It is said that before Moon became violent, it had a very kind personality, and Miyuki would patrol the Pizzaplex with it. They were considered very good friends.
•They suffer from PTSD.