What does Athena do during the battle with the suitors?

Athena first takes the form of Mentor. When Odysseus calls to her for help, she berates him for being so weak and needing to call on the gods for help. She takes the form of a swallow and watches the battle from the rafters.

When the suitors throw their spears at Odysseus and his men, she makes the spears mostly miss. Further, she helps guides Odysseus and his men's spears into the suitors.

Finally, Athena holds up her Aegis, making the suitors cower and despair as Odysseus and his men slaughter them.