Mototsugu is Kenichi's protective father and is gradually impressed with Kenichi's growth as a man, but feels sad that his son is growing further and further away from him. He has two shotguns named Sebastian and Maximilian, which he often tries to take with him in order to take back Kenichi from the Ryozanpaku dojo, however, his wife manages to stop him every time. Despite his foolish attitude, he is actually very skilled in its use (good enough for Shigure to say that he was pretty good), and when he finally shows up at the dojo (with a new hunting rifle his wife doesn't know about, named Rotowski) he is able to carry Kenichi under his arm, the gun in the other, reload while on the run, and has a good enough aim to stop Shigure's traps. He later wins a prize in clay pigeon shooting. It may not be a coincidence that his character design is similar to Golgo 13.