Talk:Crystal Princess/@comment-2600:1700:AAF0:6860:7DB3:41A1:4289:4464-20181015053332

Based on the limited information I would guess the crystal city was a fairly low level guild base that came from Yggdrasil between the 8 greed kings and (some of) the 13 heroes. The princess would most likely be the player and the knights would be her guilds NPC's.