10 years old

Near enough 6 years have passed since Sebastian's first training session with Sirzechs and his meeting with the Gremory family. His progress with controlling his monstrous amount of demonic energy progressed very well, according to the system Sebastian would finish the need for training tommorow and the day after that coincidentally he would receive his evil pieces on his birthday.

Over the years Sebastian became fast friends with Rias sometimes visiting the Gremory mansion on off other than his magic and body training to spend time with the young red head.

Rias however developed a crush on Sebastian after their first meeting and it bloomed into so much more eventually leading to her excuse of pretty much going around to the Sitri's to 'spend time with Sona' which involved Rias taking pictures of Sebastian with a camera that somehow appeared whenever she was around him, Sona would obviously accompany her best friend as a fellow Sebastian-con as Serafall had named, who when she wasnt busy would join the two girls in taking pictures of her beloved younger brother with another magically appearing camera.

Sebastian currently was currently molded his demonic power into all kinds of shapes in an effort to control them, his progress reached 99.9% a few hours ago and he was trying to make the last push for it. His demonic power acted accordingly to his whims, if he wanted to cost himself in it like a suit of armour he could except for one gap that was the last bit of his power that he was trying to control. If he wanted to release his raw power in the form of a wave shouting out from him he could, except for the spiderweb cracks he would make in the ground everytime he did this it would of been perfect, but be though it was cool so no point in changing it.

[Demonic power control 100%, well done host. Bringing up status.]

[Name: Sebastian Sitri]

[HP: 100

[MP: 100 (Peak high class)]

[Age: 9]

[Titles: Sitri heir, Devil prodigy, Handesome Shota 'That title needs to go' Sebastian thought.

[Strength: 47]

[Dex: 52

[Intelligence: 72

[Wisdom: 64]

[Host has completed a hidden quest! (Control your demonic power to 100% before receiving your evil pieces) Reward: Satan flames (Blue Exorcist)

'Interesting' Sebastian thought forming said flames on his hands. The cool blue flames on his hands felt like a breeze passing over his hands yet permanently, he willed the flames to spread up his left arm and cover the sleeve of the shirt he was wearing and covered it in the cyan flames which didnt burn him as he willed it not too.

Sebastian willed the Satan flames to stop and stood up from the grass he was sitting on in the garden of the Sitri mansion. Heading inside to prepare for the evil pieces ceremony tommorow.

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Next days

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Waking up earlier than usual due to Sona and her excitement of receiving her pieces he was pulled out of his room and down to the dining room as soon as he was dressed. Serafall however was probably the most excited out of everybody "Se-tan! So-tan! Are you ready for today?!" Serafall shouted out while both of them sat down "Yes Serafall there both excited now settle down and let them eat so they wont be late " Lady Sitri said.

Finishing eating the whole Sitri family teleported to Ajuka Beezlebub's laboratory. Arriving inside his laboratory where he was waiting next to the king piece registry with the machine to produce evil pieces and bind them to someone. "Ah Sebastian, Sona I'll let you register and get your pieces in a minute but I have something for both of you" vanishing into the deep depths of his lab Ajuka emerged minutes later with gifts for both of the soon to be kings birthdays.

Coming back with an intricate and highly detailed chess set for Sona which he handed over much to Sona's excited if her nearly jumping up and down after hugging her self proclaimed uncle is anything to go by.

Sebastian was handed a black wooden staff which was slightly bent along the handle part and curved up into a circle towards the top and curved into a bent spike pointing upwards. The staff also contained a modification in the top circle part of the staff to contain a sword in it. It was decorated with different coloured ribbons at the top part of the staff just before the circular part of the staff.

Thanking Ajuka without nearly jumping up and down like Sona he rested the bottom spike part of the staff on the floor and held in his right hand, it being light for him without the sword in the holster was because it was especially made to be used for combat and not decoration as a medium for casting spells or hitting or stabbing with the sharp wooden curved spike at the top of the staff or the smaller spike at the bottom of the staff.

"Let's get you both your pieces then, who wants to go first?" Ajuka said with another one of his reserved smiles "I'll set Sona go first she seems more excited than me" Sebastian said keeping his signature calm smile on his face. "Thanks brother" Sona said before stepping up to the the king piece monument.

"Put your hand on the monument and input as much Demonic power as you can into it.. dont worry it wont drain it all" Ajuka said and Sona nodded doing just as said.

With a flash of white light from the monument and the whir of machinery a box of chess pieces in an ornate wooden box popped out of the machine that made evil pieces, Handing them over to Sona Ajuka commented "Pour a little of your demonic power into the seal on the front and they will open"

With that said Sona opened her box of pieces with a click reverberating arouud the room revealing 15 differing shades of blue chess pieces. Except for a rook which was mutated and glowing an eerie deep blue the rest where a very light blue. "A mutated rook huh that's pretty good considering most dont even get a single mutated piece" Ajuka said lightly as if it wasnt a big deal however it was for Sona and Serafall who were both giddy considering the large smile on her face and Serafall who was quiet literally bouncing around the laboratory causing the fellow Satan in the room to sigh at her antics.

"Let's do yours now Sebastian" Ajuka said getting a nod from him as he walked up to the monument.