I am not going to give out all of the lesser gods of Olympus, but some. Some lesser gods of Olympus were Eros, which is Cupid, The graces, Iris, and Hebe. Eros is the God of graces are the daughters of Zeus, Iris is the goddess of the rainbow, and Hebe is the goddess of youth.
Mary Wollstonecraft was a writer and a teacher, prominent voice in the fight for equal rights, having advocated female rights and education rights for women. She was the mother of Mary Shelly, whom you might know as the writer of Frankenstein.
The device would be a metaphor because the phrase is comparing headmasters to giants without using the words like or as
If you have extra time: Discuss with others! whether it's online or in-person (though rough during the pandemic) can be vital to get other perspectives. For example, say I were to write a short story for some extra credit, I could ask my friend "Denise" to check this story for grammatical errors, how engaging it is, and if it seems like a generally fun or worthwhile story to read.
If you're on a time crunch: Seek answers by yourself or online. If you've got something to finish -- and fast you might need to quickly write something up or figure out how to solve a problem. Being able to quickly come up with an answer or solution is vital for the moments in life where you need to make one of those hard decisions.
Overall, if you have time you should discuss your issue or work with others, but if you're low on time you will need a solution.