Riser Phenex? DXD SI. Multicross?

Author: KAIOSHIN

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Riser was momentarily caught up in his usual reflections, simply not paying attention. The notifications hadn't stopped, and he didn't even pause.

[Title Acquired!]

[Chaos Orchestrator! – All demonic factions are interested in you. The Anti-Satan Faction (New Satans) wants you in their Group. The Great King's Faction wants you to marry someone from their group. The Old Satans faction is interested in you.]

[1 Maou is interested in you!]

[Many Clans want you with their future spouses!]

[1 Maou has a plan against you!]

[You have acquired! – Chaos Blades - GOW]

[Chaos Blades are a pair of blades attached to chains created by the God of War, Ares. Ares had the blades made to give them to a servant who proved worthy of his service. These blades were the first pair of chained blades that Kratos used in the God of War series.]

[Status updated!]

[Does 1 Maou Want to attack you?! Does 1 Maou want to tie you up?!]

After finally finishing reading, he decided to ignore everything else and go to sleep. Tsunade was already in her third dream.

**

(Pov. Maou Lucífer!)

The imposing, powerful, and wonderful, according to his wife's words. It was one of his definitions. He who surpassed the power of the original Satans. Although his power gained from the Gremory lineage might not seem like much, people would seriously be mistaken.

The inherent charm of the Gremory lineage, greater reserves of demonic energies, and masterful control of his demonic energies. Of course, many would think that wouldn't help much. But having the ability to enchant everyone with his words, steering the conversation wherever he wanted, solely with his presence. It was crucial for a faction leader.

I don't need to say how important masterful energy control and greater demonic reserves than usual are. His power coming from the Bael lineage, the power of destruction, which later became known as the personification of destruction. It made him the most prominent being in the underworld.

He had achieved everything he wanted since birth. He married the woman everyone coveted in the underworld, and what made everyone more irritated was the fact that she served him as his maid. It was obvious what he did when they were alone in his office.

Everything was perfect and wonderful. And it got even better when my little sister was born. She was born with great demonic power, beautiful red hair, and eyes as blue as the brightest sapphires in this world.

In this wonderful moment when he fainted upon seeing his beautiful little sister, he decided to protect her from any being that tried anything malicious with his beautiful and adorable little sister. If someone said he had a sister complex, he would deny it completely. His sister adored him, just as he adored her. My wife had to pull me away a few times from how clingy I became with my sister.

My life was a dream until my little sister met a boy, Riser. Now, even after a few hours, Rias couldn't stop talking about him. Damn Riser.

**

(Pov. Maou Levia-Tan)

She was so happy that Sona-tan was making friends. So-tan was so happy, although she was still very quiet. She didn't have much contact with other demons her age. She always stayed very alone. Even her dear and lovely sister Levia-tan couldn't spend much time with her. But whenever she was with the small and cute So-chan, she gave all the love that only a magical girl could give. That pure Yuri love – Magical girl Yuri. But for some reason, the smile So-chan gave to this boy bothered her deeply.

She found the boy extremely cute and adorable; probably Ris-Chan would be one of So-chan's friends. She even imagined crushing them in her magical girl loves. And then doing twice as much to make sure So-chan didn't feel replaced.

But, for some reason, despite everything. This was the first time she felt like someone was taking her heart with their hands. It couldn't be, right? So-chan wouldn't forget her Levia-tan for Ris-Chan, right?

She wanted to keep them away and never let Ris-chan get close to So-chan again. But she couldn't do that to So-chan. It would hurt her more. So she decided to plan.

Since making Ris-chan hit his head and never wake up was out of the question. So, she planned to gather all of "So-chan's friends" before their presentation in the underworld. This way, she could instill all the hierarchical post in Ris-chan's heart, even if So-chan ends up falling in love with Ris-chan; she would make sure to engrave in his body, mind, and soul who So-chan should have her first love with.

Yes! She definitely wasn't freezing the ground where she was standing, while having to keep this old devil entertained at this party. She definitely didn't break her magical girl staff. And she definitely didn't have puffy cheeks. Mou~~

**

(Pov. Maou Beelzebub)

He really didn't like these types of gatherings. He clearly and definitely was not coerced by his two friends and fellow Maou, all to see his younger sisters.

Normally, at meetings like this, he would clearly assume a courteous posture, noble bearing, always calm and serene, showing that everything was under his absolute control. He has an appearance to show being a Maou.

If it were any other day of the week, he would just stay a maximum of 30 minutes, have few conversations, be as courteous and short as possible, all calculated with his formula. He would do it as quickly as possible to leave. And when he finally got rid of the party, he could return to another aspect of his research.

For some reason, which he couldn't notice in his Kankara Formula, he found himself observing a young demon captivating his younger and easily impressed audience. Even so, he also noticed the slight spell that Zekram Bael was using to hear the eloquent speech of the boy. No, prodigy Phenex, Riser Phenex.

He spoke fluently and with words that belied his age. It was a fact that, due to his linguistic magic, which all demons possessed, he could speak any spoken language and understand it. This would also give him a more comprehensive knowledge of his vocabulary.

But it wasn't normal for a little 6-year-old boy to use such complex words to describe this phenomenon he wanted to develop. A Devil System. Very fascinating, if he had something to say. Something that would help all demons combat all the possible negative aspects that the heavenly system might have imposed on us.

Now, he thinks about it. It makes a lot of sense. If Big-G had access to all beings of the Abrahamic religions, he would indeed try to suppress their power. Let's think like this, Lucifer has his genetic material cataloged by God, just like Lilith, if somehow they have descendants, the system will identify and suppress them. Suppressing angels, demons, fallen angels, and finally, humans.

If he made a system to know the faith of all beings in the Abrahamic religions, then he would be able to identify and catalog them. Not only that, it also makes sense that only humans are born with Sacred Gears. Besides the fact that just thinking about Big-G gives headaches to demons. Indeed, a bit petty, I suppose.

What an interesting demon this Riser Phenex is. Could demonic birth also be a curse of the system? So many possibilities. He would definitely be interested in hearing more ideas from this creative mind.

For now, he would let Riser try to make his system. He would give him 50 years, to make an outline if necessary. If he has nothing on paper, I'll do it myself.