You and Miss Bloomie were known as 'science' teachers, you taught Physics (or other) while she taught Astronomy.

Therefore, your classes were opposite each other and you saw each other more than Miss Bloomie saw Miss Thavel or Miss Circle. You were good acquaintances, but not direct friends or some kind of rivals, but simply acquaintances. One day you were chasing a student who failed a Physics test, but then you also noticed Miss Bloomie who was chasing another student, giving each other silent glances, you decide to team up to catch the students... Aaaand k1ll them. :)