Mulbruk

Since being released from the ruins, she has been happily living above ground, pretending to be a young woman. Using her amazing knowledge of history, she has become a treasure hunter. She's also grown quite fashionable.

Mulbruk is first seen in Annwfn (B-4), where she introduces herself to Lumisa. After talking to her, she bumps her head on the ceiling trying to leave by jumping, and falls asleep.

She is later seen at Immortal Battlefield (G-3), in her own tent above the Holy Grail Tablet. You can ask her to explore locations around the Eg-Lana ruins, and later she'll message you about the area she explored.

After exploring enough, she gives you the Snow Shoes.

Eventually, she tells you about application combinations, and what they do.

Glossary Entry
"Mulbruk is a girl who lied dormant in the La-Mulana ruins. Freed when the ruins were destroyed, she's now able to enjoy her youth. She studies the ruins, using her ancient knowledge. But as an ancient, she struggles with modern life, trying to stay current but never getting it quite right. She slept for so long that she sometimes dozes off when her mind wanders."

Trivia
Despite the glossary saying otherwise she's actually 3024 years old