The entire school is a miniature society.
Fairness is non-existent.
Principals and teachers are also human, with human strengths and weaknesses, human emotions, human nobility, and human flaws.
But Merlin harbors a lot of resentment towards Dodo, while towards Michael, it's quite the opposite.
Towards Michael, in Dodo's words, she's uncommonly ingratiating. Towards Dodo, she's as vindictive as a jealous lover.
It's as if Dodo not only stole her brother's attention but also stole Michael.
From the moment Merlin first saw Michael, she took every initiative to get close to him, offering him chocolates, the best lunch, and even pens...
Of course, Michael rejected all of these.
And Merlin attributed all of these rejections to Dodo.
Every time she saw Dodo, she looked at her as if she were looking at an enemy.
The more she behaved like this, the more Dodo despised her.
Frankly, she didn't respect either of the two siblings.