From a Mantis's point of view
From a Mantis's point of view
A huge monster came and snatched your mantis from its home in the ocean, put it in to a small bag, stuffed that into a picth black box and left it their for a day, occasionally shaking it, sometimes violently. Then another huge monster took it out of that and put it into a tiny clear box where it couldn't see the walls, for a while. Then that monster snatched it out and put it into another small bag, into a pitch black box and left it there for another 24 hours again shaking it occasionally sometimes violently. A third huge monster took it out of that situation and put it into another small clear box and left it alone. Finally you came along and had the third huge monster dig it out of the small box it was in, put it into another small bag, then it got shaken gently (on the ride home) and put it into a final larger, yet still confining box. Then the big monster that has it now keeps lurking and peering at it all day long.
Now I don't care how out going and jovial you are, it would be a while before you even thought of settling down, let alone letting one of those monsters that captured you see you.
Peacocks do become rather out going, just give it time. Its been through more trauma than an Alabama trailor park hick, abducted by aliens and "probed". Keep feeding the mantis every day or so and it will soon come to understand you are not going to harm it, but will take care of it. They are smart critters, and will soon come to associate you with good things, not the bad stuff that came before you came on the scene.