Daikichi is a loud ball of energy and it's hard to tell whether he's joking or not, as his extreme, and versatility values is what makes Daiki, Daiki. She is a bit sensitive though, but channels her insecurities with ability to express himself through her words, and aesthetics with her music, and how she conducts herself towards her fellow peers. He won’t change himself. He doesn't want to change himself, and nothing will change that.

He speaks in a very abrasive, slightly pitchy, raspy, but it gets subtle in certain situations. A medium or medium-high pitched voice will be doable.  

Note: Daiki’s lines are pretty suggestive, and explicit to say the least, so you have to be comfortable and consenting to say his lines if you are committing to the role in case you get casted.