Golden Freddy

Golden freddy, unlike many of the heroes actually started as a villain. When phone guy gave the suggestion to lock the villains in brazil, golden freddy jumpscared him (presumably killing the man and ending the call.) Not long after, golden's giant floating head flew right at lumine, knocking her out and causing koby to start cussing out of his own frustration. Then later on that day golden freddy's floating head rushed kale hoping to bash his nose, instead kale dodged it and let golden freddy hit the wall, surprisingly he plowed right through it. (How fast was this mf flying?)
The next day golden freddy was spying on lumines computer while she did stuff and actually demonstrated the ability to talk by commenting on why lumine wanted to hide whatever was on the pc. He said and i quote, "...so uhm... why are you hiding it?" Not too long after that kale was tryna get koby to admit if he liked cat girls or not but koby yelled, "MAKE ME!" And sent the golden freddy head to lock on to and attack kale. Hu tao then, a short while after that, attempted to show koby her "black hole" koby screamed, "OH FUCK, NOW GOLDEN!," and sure enough golden plugged her by ramming into it with his head "black hole."
This is when koby saw the potential in golden and told him he'd make a great companion (this was the same day btw as in the last paragraph.) Golden admitted and i quote, "...okay sure i got nothing better to do." Then just like that, former villain golden freddy was turned into a hero who koby could summon to help deal with villains. During the search for chara later in the day (chara went missing after mr beasts second squid game ended,) koby handed golden to lumine as she was going to a place where she could potentially get attacked. Somehow though golden had the ability to not only induce manipulations/hallucinations into people but to also adjust his size and change forms, so he just chilled on lumined back small enough so that he couldn't be seen by people but large enough so that he could see people tryna sneak up on her. Golden ended up crushing a couple of creeps who tried to assault lumine. 
Still during the same day when koby made it to Orlando's house (the guy who bought chara and brainwashed her.) He sent golden to help him fight however golden was just straight up shot by Orlando. Koby also on 07/17/2022 after saving ganyu from being assaulted by villains, gave her the golden freddy head to hopefully protect her, since he secretly had a crush on her since he first saw her. It worked a charm too, when joker tried to attack ganyu golden grew large and ripped joker apart then went back into her pocket turning small again. A short while after that, the villains were harassing the heroes who were all at the same house on movie night and ended up blowing up the house with jokers help. Kale asked why koby's golden freddy head wasn't murdering the villains and that's when koby realized he needed to actually call him for him to attack and he felt like a retarded idiot (which he was.)
After the destruction of koby's house and everyone leaving that town to go to the town of scam which had a "no fight zone" golden came out of ganyu's pocket as he forgot he was there. Ganyu told him to go help koby as he'll need him more than she ever will. Golden agreed and zoomed off to aid koby, which he did. Chara began attacking koby as well with the villains (as she betrayed him and turned out to a dickhead abuser,) koby realized kale and the others had returned to help him. Turns out peter griffen recorded chara pushing koby off a bridge because he was, "talking back to her." Peter posted the video on abusive bitches.com and koby's friends ended up seeing it, so they rushed back to aid him sensing the present danger. Golden continued to be a loyal hero and assist koby whenever he needed it, and unlike most of koby's friends he actually survived the hunters attack on the town of scam. 
To finish golden may be more of a side character, but he's still a pretty chill giant floating head that can break some bones/boners if he has too.