Skill regained: Extensive science knowledge
Date: Day 52
Game won: Delriza's Game

Skill:

This skill basically turns Phi into a walking science encyclopedia, since every Zero Escape game needs at least one of those. Her knowledge will range from being able to explain quantum mechanics to antimatter reactions to dihydrogen monoxide jokes to the color spectrum to delivering a sad explanation of Archimedes' principle -- oh no wait, wrong Uchikoshi game.

tl;dr SCIENCE