Level up!

Hikaru wanted to ask Rika a lot of things, but he didn't know where to start from. At this moment, Rika's voice resounded.

[Master, you have seen the river of time, right?]

Hikaru nodded.

[So you also know that each person has a past and a future and it is linked to others. For example, in the past you have come into contact with Fellea, that will be evident in the river of time as it also affects Fellea's past.]

[If you kill Fellea, then existences equal to Fellea can find you because you and Fellea's pasts are linked.]

[However, under the influence of the Void Judgment, after you kill Fellea, her past and future will disappear from the river of time. Even those with equal or higher strength than Fellea would not be able to know about it .]

"it Will be Like that person never existed, right?"

[That's right. They won't have a past or future; it is equivalent to  being non-existent.]