Shunsei is shown to be cold-blooded, similarly to his father. While discussing the Chinese team's strategy after their first loss (despite claiming they will win by a clean sweep), Kaioh Kaku said he will fight the other matches, but Shunsei interrupted and said that each person should get a kill and said that by killing all five of them no one would care for them. He is also shown to be arrogant, claiming victory immediately after his father agreed on Shunsei's terms. Like most of the Kaioh he is confident that he is the best and no non Chinese can defeat him.

~!Unfortunately for him., he underestimated Baki Hanma by a pretty large margin.!~

The second season of Baki. 
 
Weakened by the poison from his last battle, Baki Hanma finds himself on the verge of death with no salvation in sight. However, after Baki's friend, Retsu Kaiou, brings him to China, he learns about the centurial Raitai Tournament, where the fiercest warriors fight to be crowned as the strongest martial artist in all of China. 
 
As it is now allowing entry to foreigners, Baki is informed that he will have to compete in the tournament as it holds the cure to his illness. Unfortunately, Baki's father, deemed the "Strongest Creature on Earth," is participating too. Baki 2nd Season details the events of the grand Chinese tournament, as well as Baki's encounter with the eccentric yet powerful Mohammad Alai Jr. 
 
(Source: MAL Rewrite)

BAKI: THE SEARCH OF OUR STRONGEST HERO is the official name of the 4th saga in which Baki will find strongest enemies in his path, and the way to challenge his dad once again, and this time&hellip; To lose is to die. 
Hanma Baki (named &ldquo;Wild Fang&rdquo; by his father) is a boy born under an unlucky star. Since the day of his birth, Baki has been rigorously training at all kinds of martial arts, strengthening himself at his father&rsquo;s command. For he must obey his father&rsquo;s rule that at his &ldquo;coming of age&rdquo; Baki surpass his own father, Hanma Yuujiro, &ldquo;the most powerful creature walking on earth.&rdquo; Baki&rsquo;s life has been nothing but trouble. This has given Baki a wild nature and convinced him that &ldquo;to be the most powerful&rdquo; is his way of life. Tenacious and fearless under all adverse conditions, Baki continues his training looking for new masters and new challenges to strengthen his personality and become &ldquo;the strongest man on earth.&rdquo; That road is a lonely one and Baki experienced the cruelty of his sick dad in a move that would change his life forever.

Shunsei Kaku