There are exactly 104 quests in Grunge. Previously I thought it was 105, but I had miscounted.
With each quest, you will earn a heart token, which impacts your final ending.
Below is the total list of quests that you can complete:
Sid
Sheng
Winston
Juan
Josefina (Hall Monitor)
Yenez
Winnie
Tara Lynn
Michelle (Dance Coach)
Karenina
Monae
Clarissa
Kelly
Uzuri
Lapis
Tony
Brendan
Charlie
Carson
DeAndre
Marquis
Chris
Diwali
Margarita
Tamara
Jada
Kiriko
Malik
Ale
Edd
Mrs Robinson (English Teacher)
Mr. Carver (Will) (English, Creative Writing Teacher)
Mr Heines (Biology and Mathematics Teacher)
Ms. Winters (Drama Teacher)
Georgia (Nurse)
Steph (Janitor in Training)
and Gulliby (Janitor)
Mrs. McGrady (the lunch lady)
Mr. Ramirez (librarian)
Marco
Billy
Rachel
Keke
Ali
Wade
Carlos
Rat
Sasha
Craig
Elijah
Glenda
RJ
Wendy
Topher
Mr Jordan
Candace
Michael
Brandy
Freddie
Dwayne
Harmond
Tommy
Mr. Rosales
Manolo
Diego
Javi
Amaya
Lynn
Akila
Mei (Maddie's Mom)
Jamiya
Eman
Iggi
Blue
Cesar
Rick/Richard/Dick (Sid's Dad)
Sol
Eko
Jaxton
Father Francis
Brianne
Danielle
Phyllis
Marisol
Dorothea “Dolly”
Jasmyn
Florence “Flo”
Dulce
Mrs. Loretta Lane (Colton's Mom)
Maddie
Colton
Polly
Finn
Alexis (Related to Candace)
Latoya
Abigail
Mateo
Luther
Mr. Katz
Talulah
Jessica
Vicki
Seri (YOUR OWN HEART)
- Carmen’s (not physically added to inventory, but determines the ending.)