Maybe it was wishful thinking that Minthara would be in a more solid state before starting my durge run. Instead I'll just never enter act 3 and imagine that they live very happy lives while preparing to storm the underdark

Sirius as companion

Tav=player character

Where do you find Sirius?

Pretty close to where Tav wakes up, he is crouching over a mangled fisher corpse, and deep in thoughts.

What does the tadpole show?

Him lobotomizing US, followed by him waking up in confusion, and finally nothing. a dark black abyss that seems to swallow everything.

Approval/Disapproval

He actually approves many things. He approves helping people, but after some speech checks will also approve of slaughter and violence. The more Tav influences in one way, the more his approval/disapproval adapts. If one goes on the path of evil and then becomes good, he will disapprove the other way around too. He also disapproves if a Tav or anyone tries to do skill checks alone after Sirius offered to take over, mostly if they fail.

Death of the Dragonborn bard.

A cut scene a bit later in the game than what we get. It is in pride if he is found out, if Tav went an evil path. Or desperation and apologies and utter fear if a righteous path was chosen. Tav can decide if Sirius is sent away, can stay or be attacked.

Tiefling Party

You'll get a talk about how nice it feels to help people. That he did it to fight whatever pulls his strings at first. But seeing all those cheerful faces elates him, truly. He will open up about feeling controlled and without a choice here. If approval is high enough, he'd ask to sneak away, watch the stars together, and possibly a kiss. But he wants to take things slow, especially because he is scared of whatever controls him to take over and ruin a moment.

Goblin Party

Boy is high on violence and murder, and totally open to fuck. No silly love making, no sweet words, mostly dirty, kinky sex. Minthara's sex scene is more romantic.

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Romance path moves different paths from there on.

Evil Path: It's dangerous sex, and banter. Only sometimes gentle emotions peak through. He WILL kill Isobel, and Tav will not have a choice here. This is the path he was set on, and it allows him to get the Slayer Form later without hurting the player character. In the end he'll accept Bhaal, and no speech checks will change that. But he'll tell Tav that he'll stay around, until the day it was their turn to die by his hand... but that he hopes they'll be the last, and he'll follow soon after them. he still seems haunted by his choices, sometimes showing that he just gave up. There is a hopelessness in him... and any laughter cannot be as warm as it can be on his other path. He accepted he is a puppet from a higher power, he does not tug on his strings.

Good Path: He doesn't kill Isobel, more struggling in the shadow lands, nightmares opening up about them. Holding each other at night. One night in Act 2 he will ask the player to tie him up, else he'll kill them. If they do, congrats they'll survive. If not... game over, no resurrection. But after that is done, first sex scene, very romantic, and also changing with choices. He'll ask how they want to do it... and it can be kinky, it can be vanilla... top/bottom... just really indulging each other's wants and needs. (he will not fully dom in this scene, and the one where he is submissive is more detailed here) In Act III there will be all the game reveals. Who his father is, what his fate is, Orin being obsessed, Gortash being his ex lover, etc. And finally, the showdown with Bhaal. Here he is for a moment about to surrender. Because he is SCARED, feels weak in front of a God that made him, remembers the way he was broken, scared to suffer that again... but just supporting him, reminding him he isn't alone is enough to make him snap out of it and reject Bhaal. From there on he can be fully dominant, even sadistic if player wants/enjoys that in a romance/sex scene. But either way lots of after care and snuggling. In Game choices and talks influence his Epilogue. Maybe they also took in orphaned kids. Maybe he is going around and studying Bhaalspawn... but he'll usually ask for Tav's hand in marriage, wanting to make it official etc.