After Yujiro has beaten Baki into unconsciousness, decimated his friends, and killed his mother. Baki is walking through the streets, happily talking and joyfully describing how wonderful it is to be in such a loving family while carrying his mother on his back. A stranger bumps into him and reveals that he was imagining it all and is only carrying a ring while wearing the bruises and scrapes from his fight. He screams out, much to the dismay of the people on the street, fumbling after the ring that belonged to his mother. Crying, he laments.
Baki: Not just yet, mister. Let me hold onto this for just a moment longer.
Much more intense in the manga, where he isn't carrying his mom's ring. He's carrying his mom's corpse.
Emi's final moments with her son Baki; they're probably the only time Baki will ever have a (somewhat) normal parent-son relationship. You WILL hate Yujiro afterwards.
Baki visiting Yasha Ape after their fight. He realizes that the Yasha Ape wasn't just a vicious predator, but a creature with its own culture, as shown by Yasha's cave filled with his ancestors' skeletons, and that Yasha is likely the last of his kind. Baki apologizes for misjudging it, and Yasha gives Baki one of his own fangs as a gift. Even more of a tearjerker, when Yujiro taunts Baki with a box with Yasha's head inside, and then proceeds to eviscerate it to pieces with one decisive strike.
Once Orochi manages to defeat Dorian, the Death Row Inmate loses himself even further. He ambushes Orochi, blowing his face off, and then is defeated in one strike by Retsu. As it turns out, Dorian wishing for a genuine defeat (one where he is absolutely defeated with no possible chance of him winning) as results in him wishing for a genuine victory, realizing he's never defeated someone without cheating through use of tools or other Combat Pragmatist strategies. The result is that despite being one of the top five dangerous death row inmates in the world (along with being a Kaioh purely on the merit of his own strength), Dorian realizes he's essentially wasted his entire life as a martial artist. Dorian snaps, regressing mentally into a Manchild, with Retsu describing this as his soul being "cleansed".
Pickle's existence after being freed from his salt prison is a turbulent one. While he's a nightmarish caveman that is prone to eating his rivals and doing whatever he sees fit for entertainment, several fights end up showing him for what he is deep down; a confused and terrified man who's trying make sense of the world around him. He loves fighting like everyone else, but in his era, expending energy fighting could mean life or death, and so he is hard-wired to eat whatever made him so tired to start with to rejuvenate himself. The problem is that while he's been sticking to mostly animals until that point, he's been at this for so long that when it comes to fighting humans - who he recognizes are still people like him - he doesn't know how to separate that kill or be killed dichotomy from the act of combat and thinks every fight must be a fight to the death. Thus, if someone attacks him, he goes for the kill and ends up doing so very quickly. But if he finds they're keeping pace with him, his hunger takes over and he begins trying to eat the combatant while tearfully mourning them because he genuinely cannot comprehend an alternative. It becomes Baki's goal to try and teach him that since his era, people have begun fighting for entertainment and to express themselves as opposed to simple survival so he can finally enjoy a battle without feeling like he needs to kill someone.
At the end of the fight between Yujiro and Baki in the third Baki series, Yujiro still manages to beat Baki (though this time Baki had become so strong that Yujiro had to put some real effort into beating him and didn't come away unscathed). While that isn't a tearjerker in and of itself as it was an amazing fight and even Yujiro who rarely ever compliments his opponents nor seems to get any real satisfaction from his usual fights said that Baki would soon be a Hanma without a care in the world and that the fight was fun, what was heart rending is that while Baki couldn't move and was still conscious, his will to keep fighting was so strong that his battle spirit created a shadow of himself tangible enough for expert fighters to see, which then proceeded to attack Yujiro. Doppo Orochi, one of Baki's closest friends and allies, a master Karateka and Person of Mass Destruction himself and definitely a Good Is Not Softkindofguy looked like his heart was breaking when he saw Baki beaten, injured, and unable to move with his fighting spirit still burning strong.
Doppo: ...With nothing but his fighting spirit...Even in that state it doesn't waver...I can't bear to watch this any longer.
Retsu’s death at the hands of Musashi. Made worse with Tokugawa’s regret of trying to pair Retsu against Musashi.
Tokugawa: I made a mistake. That is all there is to it.
