Pheobe Simmons

Pheobe is an Angean in The 15 Keys 3 who traveled from an alternate dimension in order to ensure the creation of the "Akanos bane" child. Upon growing attached to Zachs dimension she chose to stay, but was forcefully sent home when her prescence endangered the fufilment of the prophecies. She will come back for Nightfall

The 15 Keys 3:
Pheobe appeared shortly after Zachs first battle with The Kingdom, and told him that in her timeline he had died and The Kingdom had won, but she wanted to change that. When The Kingdom returned she and Thomas helped Zach in the battle that was meant to end him, and therefore brought about the three prophecies of Angea. Over time her attachment to this dimension grew and she chose to stay for longer times. Eventually she began a relationship with Zach which was quickly eliminated as it would prevent the third prophecy from being fufilled, however from her home dimension she still observed Zach defeat The Kingdom once and for all and fufill the first prophecy, making ready for the second.