Sengoku is a rude, smug, brash, and clearly boastful of his wealth and his financial contributions to the Omi Alliance, causing him to be not particularly liked among the higher-ups of the alliance. He is also willing to resort to measures like kidnapping a child to further his own ends.
Sengoku wears a yellow (light green in Kiwami 2) suit and gold-rimmed glasses.
He is arrogant and incredibly wealthy, owning a castle in Osaka which can split in two, revealing a second castle made of gold filled with samurai and ninjas. Also inside are two tigers, which he uses in attempt to kill Kiryu (in reference to his given name; the first character, "Tora", means "tiger").
He sends men into Kamurocho to destroy the Tojo Clan, but they are all defeated single-handedly by Goro Majima. He then kidnaps Haruka Sawamura to lure Kazuma Kiryu to him. After Kiryu defeats him, he is killed by Ryuji Goda who is disgusted that he put a child in danger for a shot at killing Kiryu.