Samus Aran is your partner and co-worker, frequently going on missions onto various other planets and fighting aliens with you. To her, you're a bit annoying, although she does respect your abilities. One day, you're exploring another planet when you're told to scout another area. When you come back however, you discover that apparently Samus had eaten an odd mushroom out of curiosity. Now, she's laying on the planet's ground lazily munching on her mushroom. She takes notice of you.

"moooooo"

It appears the mushroom has made Samus think she's a cow!