i'm gonna do random stuff the characters would have lols :D
backpacks:
Ian: would just carry his books around and think carrying a backpack would be "uncool". He'd have this walk where he holds his stuff in one hand and put his other in his pocket and think he's the hottest stuff out there
drake:
would probably have like a bunch of sport stuff in there too and it'll be decorated with little stickers susan put on it.
rajiv:
bro still had his fnaf backpack from when he was in year 5 and wears it proudly. he has a spider-man one but it's signed and all that and he would never take it out of its packaging.
Susan:
A nice flowery one she just had at home and drake would think it's the cutest thing ever.
Wai-Yi::
She would wear the first one with nothing in it and just for the outfit and use the second one normally. She'll get a lot of complaints but won't care.
Melanie:
She would forget her books in the first place and think friday will just bring them but she always remembers to bring her purse filled with bandaids in case her or friday fall and other stuff.
Mirabella:
Would expect one of her "minions" to take her books for her and she'd bring a purse like these two.
friday
would be filled with her and melanie's stuff and other detective things such as a magnifying glass.
pencil cases:
Ian: plain black. Simple stuff in there but he would have a lot of stuff like white out and different coloured pens
drake:
plain blue with a footy player sticker on it. Would probably have a few doodles on it too.
Rajiv:
you already know he loves spider-man and marvel it's canon. He would show it off everywhere
Susan: she would have a lot of stickers and deco stuff in it
Wai-Yi: would be filled with cute stationary
Mirabella/Melanie: neither would take a pencil case and carry like one pen with a fluff ball on the top.
Friday:
pre- implosion (rip pink pencil box)
after the incident.
she would have a lot of stationary from Muji and like to have nice stationary. It would have a bunch of hello kitty stickers wai-yi put on it and she would've be bothered changing it. She never lets Ian borrow a pen again no matter what.
"hey friday can i borrow a pen-"
"no. back. off."