Recent events have revealed that Zico was not always the kind and patient man he is now. Revelations about Zico's past have surfaced recently since the appearance of Zed's mother, Sara. It became obvious that Sara hated Zico, and Zico was hiding something that was of great pain to him. Zico later revealed to Zed that Amil Gaoul had once been the guardian Spirit of Templar but no one could wield him, not even Zico. To ensure Templar's survival, Zico had begun an aggressive campaign to find a Shard Caster for the Key Spirit. This appears to have gone on for some time until Zico discovered that Amil Gaoul had chosen someone else. Zico had been shown a vision of Zed's young mother, pregnant with Zed.