[SPOILERS!] Sweetheart's Identity

Since Dingaling confirmed it's not Dr. Yado's wife, and has a meaningful name "Sweetheart", it has to be a meaningful character, hence the possibility of non other than Lisa. My points are as follows:



After killing all warlords, the fight consists of "Sweetheart" and "Berny". Buddy somehow hallucinated (she hallucinated many things unrelated directly to her) the name "Berny", and it sounds like a love-bird name for Bernard (Buzzo). Only Lisa could've called him that way, since she was his only love. On the other hand we have Sweetheart before that. Buzzo greatly adored Lisa, so the name "Sweetheart" can be a hallucination in the name of Buzzo. To summarize this point, there are 2 Joy Mutants, male and female, Sweetheart and Berny. This leaves Sweetheart to be Lisa.



Also, the coffin's location. If visiting the Joy Lab, we will encounter what seems to be Lisa's coffin. There's a recent note from Buzzo saying he can't do what he's doing. But why is the coffin located in a Joy Lab? (I don't think it's a hallucination since you can physically pick up the bottles and pills, and the fact that you can return to the place at any time).



In addition, there's Lisa's mutilation by Buzzo. The only thing he did is cut her (based on the ending dialogue between the two). We don't know what place got cut, but it was a place which would make Marty not want her anymore, probably preventing any more future sexual harassments.

If her father doesn't want her anymore, that means she has the right to leave, and be free. Her coffin is in a Joy lab, so it's assumable that Lisa could've spent her time there.



Why does Buzzo stay with Yado even though they don't get along? Maybe Buzzo does it for Lisa, since her coffin is in a Joy Lab?

How about a long-stretched theory of experimenting on Lisa for reasons that can be either for her own good, or for Yado's good, but fine enough for Buzzo to stay?



We don't have clear facts for Lisa's assumable suicide incident.



Sweetheart defended Buddy from 2 incidents, both were about to be sexual harassment incidents, the second incident however was caused due to Yado playing the trumpet, probably this time taking over Sweetheart. It seems the only good thing Sweetheart did was preventing sexual harassment incidents. Joy mutants are driven by their inner feelings and desires. Lisa had desires for revenge, and killing rapists, who remind her of her father, seems to be a reasonable drive.







I can think of more points, but for now I don't have any.

What do you guys think?