The Hero title activates automatically when the Holder in question is in combat with the Demon Lord which is also in a way, a Title to Demons and those turned into one as Lisa actually WAS originally human! She murdered her originally parents HAPPILY by the way if you ever thought she was VICTIM IN ANY WAY! (She is not nor EVER WAS! Compare her WORSE tten the Demons in "Frieren: Beyond Journey's End"! Yes she's a WORSER Sociopath then THEY ARE! But there is no TRADEGY to it, no CONFUSION on their nature, Lisa loves despair, where the Demons in Frieren are just following their instinct to kill humans even with no malic involved! Something Lisa has ALOT OF, same with the rest of Demon Kind! )
But when it activates, the Demon Lord Suffers a Constant Ticking Clock like LEVEL DOWN! By that I mean her levels will start dropping, thing is I just said in the last spoilers that she is TWICE Toru's Level, so it won't be INSTANT hence "the Ticking Clock" and WHY the Hero needs to be strong! They have to buy time till the Levels reach the point where the Hero is actually able to overpower them! So it's a LITERAL "Battle of Attrition" which is funny since in ALOT of RPG, the Final Boss usually is the one to WIN if you try this with them because they don't have MP or a limiter much on their super moves while you DO! So that is a funny. Toru is later able to because of his skill STEAL the Title from Sain, not that it isn't more FITTING on him then it EVER WAS ON SAIN who lost THE RIGHT TO BEAR IT the SECOND he decided to WILLINGLY USE THAT CHARM EYE!
It will choose ANOTHER naturally if ANYTHING happens to the one who has it, THIS is why Lisa never killed him, and yeah she COULD make him a CRIPPLE.....but where's the fun in that! Everything Lisa manipulated the fool into doing was simply for HER amusement....Amusement Toru RUINED by not "being the Loser Cuck he was SUPPOSE to end up after her plans" Her end specifically is once Toru gets her in the MANAGABLE levels and she realizes she's losing, she finally panics and realizes she's going to die, so like the POS EX that she is, she tries to BARGAIN by claiming she DID love him, despite all her MOCKERY up to that point after her reveal admitting she never loved him once and has been lying to him since Day 1 along with of course ADMITTING to murdering his parents! Toru decides to give her a taste of her own medicine and "bites" gving her the condition that if she shows their engagement ring, then he'll spare her! Bitch shows him SAIN'S Ring, only too late realizing it and REMEMBERING that "she threw it at him back in chapter 1" an act she never thought would come back to haunt her!
This is Toru's nice ay to let her DIE in the DESPAIR she loved so much! Letting her THINK she grabbed a rope, only to realize "it's around her NECK" before cutting her down! ENDING HER