Thanks to Giselle's information, we reacted faster than anyone else. Except that US is far from Searise so it will take a while to get there and the Heroes over there already prepared to do something. Well, my parents will be safe for sure. Mom still hasn't said the keyword that will alert me in case of danger.
That's the word that I made Mom and Reina to be able to alert me if there's a situation they can't handle. Not only that, I upgraded the magic circle so once they said those words it will be easy for me to teleport to their location without costing too much mana. Instead, it will cost them their mana. Only after their mana is out will I need to use my own mana for the teleportation.
And yes, the reason I didn't teleport there right away is to save some mana. It will be useless if I go there and out of mana.