One of Athena's most familiar attributes is the aegis, which she sometimes wears as a cuirass but more often as a cloak over her shoulders. Of course there are different versions of where the aegis came from and as usual it was not quite easy to choose between them. According to one version, the aegis originally belonged to Zeus (Homer often calls him "Aegis-bearing Zeus") but it seems like Athena is free to borrow it whenever she wants (in the Iliad it says that she borrows her father's clothes too when she dresses for battle). Though it sometimes is said to be made of goatskin, even not the thunderbolts of Zeus can break the aegis. The sight of it paralyses people with fear, since it often is described as bearing the head of Medusa.
There is also a version that says that Athena made the aegis herself. In the war against the Gigantes she killed the giant Pallas, stripped his skin off and used it as a shield during the battle (I guess that story also served as an alternative version of how Athena got her name Pallas Athena). On one hand it would have been pretty cool and badass (but also a bit cruel) if Athena made the aegis from something she had killed herself, but then it would take some time before we got to see her wearing it. So I made it a gift from her father.
Ooooh! Was the monster kampe the Tartarus warden I wonder.