Harry tried to keep his head down as he made his way to Transfigurations next to Mayumi— he's still a little bitter towards her— because an older Gryffindor's decided to follow them and loudly insult him for everyone to hear.
"— Serves him right, Karma, offing his parents—"
Harry could almost hear something audiably snap inside Mayumi. And watches with fascination when she swiftly rounded up on the much taller boy and hissed like a viper.
"Now listen here you two-faced little—"
The ten points she lost them for vulgar language was totally worth it.
Oops, Bed time. See you in about ten hours!