Since I had a lot of homework to do so I couldn't write a proper chapter here is the side story for some Insights to the SIW interaction. If their holder is asleep.
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Yuki - Yui's SIW
Uta - Yuna's SIW
Eiz and Mina - Hino's SIW
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In a beautiful dreamscape, you could see 3 girls with 1 man sitting around a table while drinking tea.
"My Yui is really interesting!!!! She's really dedicated to her brother. I mean who the hell become brocon even though they're not related by blood?" Yuki said while chuckling.
"It happens but rarely." Eiz said calmly, "How do you know?" Yui asked. "Well we're older than you're since Me and Yuna had been together for a long time and Mina and Eiz always be with Hino for a similar time to me and Yuna," Uta said while looking frowning a little. Eiz and Mina also look sad
"Wait, do you guys mean you're older than me but our host is similar in term of ages. How is it possible?" Yui titled her head, "Well just as we said we had been with them since their very 1st life it's just every time they died. This is their 20th reincarnation. Their memories would be sealed but not ours and we can't say anything about their past to them. It's a taboo for us SIW the only restriction we have." Mina explained.
"So basically I'm of the newest generation and you guys are of the old ones?" Yui asked again seemingly interested in the topics, "Well the 1st generation to be exact. Since we're born when the god of creation himself was created." this time Uta answered
"Ahh, I see but why do the gods could sense you guys but don't know your generation or your host past lives only know the one that they died in before being reborn?" Yui said while scratching her head. "Well that's a special perk of being a 1st gen SIW, we could mask our memories and since our host old memories are sealed they couldn't scan it. There's a flaw though, it's like the current helper system like the one my host have. Just as you can see it know my host have past lives but don't know the exact number. It only calculates how much of the seal had broken by the host." Eiz answered
"Ahh, I see." Yuki eyes shined and looked at them a little jealous. "Hey don't look at us like that."Uta said while looking at her "Hmph, Yui will catch up to you guys soon." Yuki said while puffing out her chest.
This makes Mina and Eiz jealous since Yuki breast size is bigger than theirs. They looked at each other and smirked. Then they looked at Yuki specifically her chest. Seeing this Yuki sweatdropped. "Wait what do you guys want?" she said while taking a step back and cover her chest.
Then Mina and Eiz started to chase Yuki. They pushed her down and started playing with her breast causing her to moan. Uta seeing this started to close his eyes and meditate. 'I'm not interested in them. I'm a monk clear of impure thought.' Well, he opened his eyes and got a nosebleed. (AN. at least he resisted for a little...) He then fainted.
After a while, Mina and Eiz finished fondling Yuki breast. Yuki was there laying down with blank eyes. Mina and Eiz are really brutal in making her fell pleasure she started to question her self in her mind. 'How do the got so good at pleasuring girls ??'. (AN Well they're really old after all)
~Author realm~
Then Eiz and Mina looked into the sky and I swear I saw them seeing right at my eyes. Their face and aura screamed say that again and we would kill you. Even though I was the strongest existence right now they 3 could fight me to a standstill. So I just kept silent.
The 3 SIW Mina, Eiz, and Uta the 1st gen born at the same time as the god of creation. It's more to say they're of the 0th generation since they choose their host by themselves and they needed to pass through their test. It was really hard to pass it but Hino and Yuna could pass them.
Hino even passes the test from 2 different SIW. Even I couldn't clear the last stage of their test. The test consists of 4 stages. 1st being the test of Choices, 2nd the test of Mind and 3rd is a test of Determination, and lastly the test of fate.
It just shows how powerful Hino and Yuna are in their prime but they still died. If they couldn't even defeat that monster but only seal it. There's no one else who could do it.