The Child-Bearing Badass

 

Name: Oga Tatsumi, Ogre, 'Mad Dog'
Origin: Beelzebub
Gender: Male
Classification: Human
Age: 16-17
Powers and Abilities: Super strength, speed, durability, the Zebul Contract that is shared between Oga and Baby Beel allows Oga to access large amounts of demonic power and the ability to use powerful lightning attacks and energy blasts, resistant to electricity/lightning (Oga gets constantly electrocuted by Baby-BL making him somewhat used to it, as a result, Oga was able to withstand 12000 volts without taking any damage)
Weaknesses: Oga and Baby BL cannot be separated by more than 15 meters or else it may result in instant death for Oga, using Black Techs causes Baby Beel to rapidly age.
Destructive Capacity: Wall level (can easily punch through walls and break concrete) Small building level after his training (could split a giant boulder in half) | At least city block level+ (blew away his whole school) possibly higher (made a giant explosion with his Zebul Finisher) | City level (Overpowered Fuji, who could make a volcanic eruption that covered the Demon World in darkness with the same attack which he stated would turn everything within a 10 km radius into ashes) possibly higher (Satan's battle with the Great Demon Lord was stated by Hilda to have split the Demon World in half, has access to Beel's full power, which is implied several times to be a threat to the planet. En was stated to have destroyed a part of the Demon World with his tantrums, boiling the sea for 7 days and 7 nights)
Range: Average human melee range, several hundred meters with lightning attacks
Speed: At least faster than the eye (can easily blitz groups of thugs) | At least Faster than the eye can see+ with massively hypersonic attack speed  initially (could summon lightning bolts at wish), massively hypersonic after his training (faster than Hecadoth, who blocked his own lightning bolt) |  Massively hypersonic, possibly higher (created enough Zebul Emblems to reach outer space in an instant, sent Fuji flying several meters with his Zebul Finisher) 
Durability: Wall level, Small building level after his training | City block level+ | City level 
Lifting Strength: Superhuman
Striking Strength: Class KJ, Class MJ after his training | Class GJ | Class PJ
Stamina: Quite large, can fight for a long amount of time
Standard Equipment: Baby Beel is often attached to his back
Intelligence: Skilled combatant, not very intelligent otherwise
Notable Attacks/Techniques:
 
Zebub Contract: This is the sign proving he's the royal family contractor and allows him to use Beel's demonic energy.
Zebul Spell (ゼブルスペル, Zeburu Superu): The spell on his right hand expands and grows, moving up his arm and spreading across his face. The more it expands the more Oga's power grows. First, when he lost control against Kiriya the Zebul spell temporarily extended up to his arm, over his trunk, and across his face. After his training with Saotome, he's able to recreate that state by drinking the Super Milk, but his Professor warns him that if it goes any further, he might not be able to become human anymore.
 
Zebul Blast (魔王の咆吼, Zeburu Burasuto; Literally meaning "Demon Lord's Roar"): Oga punches his opponent and releases a large amount of demonic energy that's strong enough to destroy a building. After his Ankokubutō training, Oga can use this attack freely without having to wait for his energy to build up.
 
Zebul Emblem (魔王の烙印, Zeburu Enburemu; Literally meaning "Demon Lord's Burning Seal"): Oga uses the Zebul Spell to target his opponent, then punches it until the enemy explodes from the massive power build-up. Through Super Milk Time he can stand on the emblem in mid-air and use its explosion to increase his speed. Oga can also attack with more than one emblem at once when used in conjunction with Super Milk Time.
Zebul Finisher: This is Oga and Beel's ultimate technique which it was first used to defeat Naga, Hecadoth, and Graphel together that involves placing hundreds of Zebul Emblems around the opponent and he proceeds to create a linear chain of Zebul Emblems in front of him that acts as a trigger for an enormous explosion that destroyed the top of a building. It was used when Baby Beel gained complete control over Oga's body from their untrained Super Milk Time. Later on, it was used to defeat the fusion of Fuji and Satan where Oga performs in his normal state and has hundreds of Zebul Emblems placed in front of him like a wall that went above even the Earth's atmosphere. Oga then proceeds to unleash an enormous energy blast this time that stalemated the Fuji/Satan fusion's final attack before overpowering it by placing numerous King's Crest on humans and demons alike that are aligned to him to absorb their power.
 
Super Milk Time: This is a technique that Oga developed to erase the limiter between him and Beel resulting in them becoming more synchronized, this synchronization vastly improves his physical abilities and the power of his spells.
 
Black Techs: This technique is an improvement of Super Milk Time and also speeds up Baby Beel's aging process, it grants Oga more control over his synchronization and also boosts it offensive and defensive capabilities. With this technique, not only Oga, but Baby Beel is powered up by it.
 
Demonic Energy Blasts: Whilst controlling baby Beel's energy he can release it in a powerful blast with his punches.
 
Annihilation Energy: Oga combines controlled and fused demonic energy within his body to make the most use of his remaining demonic energy.
 
Super Saiyan Switch:: When Baby Beel releases his maximum demonic energy and converts it into an electric aura and then amps Oga with it. It gives Oga increased durability, speed, strength, and the ability of pseudo-flight via incredibly fast speeds that allow him to basically leap on air.
 
Notable OBD Victories:
 
Notable OBD Losses:
 
 
Other:
 
Key: Base | With Baby Beel | Super Saiyan Switch