Sero is amicable and has proven to be one of the more sociable members of Class 1-A. He can sometimes be loud and showy, often trying to impress his peers with his Quirk. He is often the only person to call his classmates out when they act crazy. He is pretty humorous and usually makes jokes with his classmates. However, when push comes to shove, he is a brave hero-in-training who wishes to prosper on his while helping others do the same. He makes friends with those around him and is shown to be a very laid-back guy. He can keep up his confidence and make an effort, even when he believes the odds are stacked heavily against him. Sero has a teasing side that he shows on occasion. He can also be one to speak his mind and at times insult others without meaning to. Though not openly flirtatious like Denki or Mineta, he still has some interest in girls. 

If you could sound similar to his English VA, Christopher Bevins, that would be great, but it is not required!

English VA Example: Spread throughout this video- https://youtu.be/80RMJgdrcsQ