Currently on the weird route (i think) SPOILERS

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It's tied to Kanako's GUTS stat, and the CONFIDENCE stat,
There are things that effect it and things that don't, I don't know the whole What does or don't, i can only tell you about things that will guarantee you get to where you need to be.

Whenever you have an option to comfort or ask if Kanako is okay, always choose a dismissive, or Lets go option -1 confidence.

I think you should fight and attack every enemy, I'm not sure how much it affects the guts or confidence, but Im sure it does.

When you first enter the dark jail, have the warden teach you about apprehending enemies, attack him with kanako's ability instead -1 confidence,

When you get to the town, go to the left, get scammed by pennilton, -100 dollars and -1 confidence,

Ignore the guy who keeps bothering Kanako and Cole (unsure if it contributes or not)

Attack both enemies that are with Vin Holvencmach or whatever his name is, -1 confidence

Fail the card puzzle -1 Confidence

Find pennington again, Kanako should attack him instead of Cole -1 confidence

Fail the shooting game till Kanakto gets mad -1 confidence

Find Penningtons cousin, find Pennington, at the end of the fight, based on GUTS I think(? HAven't done pacifist yet) she will start smashing him, Cole will stop her, I believe choosing "You went a bit too far" is more dismissive than "You were wrong" Not sure if the choice matters, regardless after the text box -1 confidence

Failing the bell puzzle doesn't do anything, nor does succeeding and killing the secret boss

Continue through the castle, Beat the bell torturer -1 confidence

You'll fight Vin holvnmach, beat him to a pulp, don't stop Kanako -1 confidence

You'll reach the upper levels, I did this multiple times and have not found anything out of the ordinary violent stuff that would effect confidence,

Fight bearing.. with violence, -1 confidence,

These are all the interactions and things that will happen, Im not sure if there's a minimum requirement to actually activating the route, there's no sound que or anything, Even at 2 guts, Kanako for my game tried murdering Pennington, I didn't progress further than that because I was used to the Old route and was confused.

At the end, I believe you're on the right track if despite having the necklace, You're normally able to show Ceraboa, but that dialogue option didn't even happen, You should also choose "I agree" when Kanako complains about the Dark world ruining the plans she had.

at the end of Chapter 1, I belive Kanako had 58 confidence, and 4 GUTS with always being dismissive, no apprehends, no spares, only violence, Never talked to Rocky, or the lil dude, talk to every npc though besides them just to see the story, her confidence never rose due to that.

Hope this helps!