Chapter 4 continue:

Killler:

Chapter 4 end

Remains 48

Chapter 5:

Locked themself up in their room:

Checks if they still okay:

Victim:

Killer:

Chapter 5 end

Remains 46

Chapter 6:

 Don't appear at the meeting:

Victim:

Other victim:

Killer:

Chapter 6 end

Remains 43

Chapter 7:

Tries to cheer up everyone:

Victim:

Killer:

Chapter 7 end

Remains 41

Chapter 8:

Makes a cake for the protagonist so they would cheer up:

Eats the cake instead:

Victim:

Killer:

Chapter 8 end

Remains 39