Hikaru was startled, and he asked: "So, is there no way I can keep them in check? Can't they betray me at any time?"
He began to feel afraid. The System had previously told him that the monsters he summoned would be loyal to him; however, now Rika told him that Vuni and Tsuraguki had the power to break the bond between him and them.
If they really broke the bond, then he would definitely be in danger. No, they would certainly kill him if they wanted to.
[Master, the situation isn't that bad.]
"What do you mean?"
[In fact, there is still a bond between you and them, contrary to what you are thinking; the bond between you and Vuni and you and Tsuraguki is extremely strong because they all want to be loyal to you. Although they could have chosen to destroy the bond, they didn't because Vuni and Tsuraguki sincerely want to be loyal to you.]