Janus needed the guardian angels in order to save his mate's life and at the same time, Jedrek received an order from Selene, the moon goddess, to gather all the guardian angels for the upcoming war with the devils and also because of the rules, which were enforced by the shadow warriors could no longer be tolerated.
The guardian angels were not supposed to be locked up in one place, they should roam around the realm, to abate the darkness. This was also one of the reasons why the devils managed to create such remarkable force after so many attempts as no one except the guardian angels could suppress the darkness that they spread.
However, the timing was not right. Janus heard that and forced Jedrek to let him see the guardian angels when he heard Jedrek's warriors managed to tackle down the village of angels and eradicated all the shadow warriors who had been protecting them for years, only a day before the war.