Princess Sasami is the younger sister and traveling companion to Ayeka. When Ryouuh crashes, Sasami takes it in stride. She tends to be the most sensible of all the women that live with Tenchi, and she works her way deep into Tenchi's affections quickly. She and Ryo-oh-ki are also very close. The pair is almost inseperable.
Sasami has a secret, though. When Ryoko attacked Jurai 700 years ago, Sasami was wandering the royal castle. She found her way into the grand room where the Trees were kept when not being used. Where Tsunami was protected by a maze of teleporters at the bottom of the room. Sasami enjoyed herself immensly running from tree to tree saying hi, when a blast rocked the castle and knocked her off a ledge into the abyss. Tsunami found the young girl barely alive and took pity on her. It bonded with her and gave her the power to survive. It caused a crest to appear on her forehead as well called The True Emblem or Emblem of Power that gives her special powers. Sometimes the power to foretell through dreams. Sasami will grow up to be Tsunami. She will become an emissary of the Goddess in this dimension, and she will hold the power of the Juraian flagship.