Tifa In The Mansion Part 1 -mujitax-

Cloud had warned her. “Don’t go alone,” he’d said, his eyes flickering with that distant, haunted look he got whenever Nibelheim was mentioned. But the mansion held answers. Beneath the dust and the shattered chandeliers, beneath the portraits of a family that never truly existed, lay the truth about Sephiroth, about Jenova, about the five long years that had stolen her childhood.

Because Corneo only meets with women he finds attractive, Tifa must participate in his "bride selection" process. Tifa In The Mansion Part 1 -Mujitax-

Inside, she discovers a secret observation room. On a dusty terminal, she plays a holo-recording of a Shinra scientist discussing a “post-Jenova behavioral catalyst”—a compound designed to lower inhibitions in enhanced soldiers. Before she can process this, the power fails. Cloud had warned her