I have an essay on my definition of Greek Mythology. I need to talk about a Titan and Olympian god/goddess and one myth.

I have chosen to pick three that all involve each other somehow.
Medusa and Athena relate because Athena is the one who turns Medusa's hair into snakes and so on.

Which Greek Mythology Titan could relate to the stories of either Athena or Medusa?

We have a senior t-shirt design contest
in school and our school mascot is a titan, and titans link
to greek mythology. At first i was thinking of using
Roman Numerals, but i changed my decision.