Bashum has brown eyes and brown hair in a short bowl cut with the rest of his head being shaved. He also has some facial hair that, if grown out, would constitute as a goatee. Sometimes he is shown wearing a monocle over his left eye. His figure is slim in comparison to people like Kentas and Gaitan but he is still bulky when he powers up.
He listens to commands and follows them well, respecting Zaiga and Maduke. Despite this, he appears to be opportunistic and doesn't take nobles as a serious threat like most warriors which is shown when he attacks Raskreia.
As a warrior he has to train though it is unknown if he is a true warrior or only became one after modifications. He is aware of Zaiga having competed with Maduke and Muzaka for the position of lord.
Bashum insults Kei, Raskreia and Raizel upon first meeting them with Gaura, but is reprimanded by Zaiga for doing so. They're both shocked upon hearing of the identities of the three nobles and object to Raizel leaving but Zaiga tells them to let him through so they do as he says. When Rozaria attacks the castle, Bashum is shocked. As Zaiga faces Kei, he is impressed by Kei's strength against Zaiga.
Bashum watches the battle between Kei Ru and Zaiga and thinks Kei is terrifying, shocked that he held out this long. He wonders if all the nobleclan leaders are this strong. He also wonders if he should leave everything to Zaiga like this. Noticing Raskreia watching the battle, he thinks he might be able to get rid of her while she's distracted which would also increase his position among his people and would get Zaiga to acknowledge him. He fails however as she uses mind control to slow him down and attacks him with Ragnarok. Bashum falls to his knees screaming in pain.
Muzaka then arrives. Bashum watches Muzaka and Zaiga fighting and is worried to see Zaiga being pushed back. After Muzaka slashes Zaiga to pieces, he is left stunned.