Make no mistake... Athene was called The Grim Goddess for good reason. In the battle for Troy, she and Ares exchanged blows. She deflected his spear and knocked him to the ground with a boulder. He had to be assisted from the battlefield by his sister Aphrodite.
If Athene could spoil an otherwise good day for the God of War, she could probably spoil your party too.
As for answers 1 & 2... No, Athene was never a Springtime type of immortal. After all, she was born wearing full battle armor and she was one (of only three) who could not be affected by Aphrodite (the other two were: Hestia and Artemis).
These Fun Facts were taken from The Iliad and the Homeric Hymns.