So, the thing is, Vanyel isn't doing this at any point, that I know of, that's not at all a Vanyel in the song. Not towards Leareth, because… for one, by the time in a story that Vanyel — 'trusts him to be good' is reductive, but it's not wrong — he's usually worked out a lot of his own complicated ethics thoughts, and is practiced at catching depressive distortions, and is deeply in the habit of trusting Leareth at all on anything conditionally, for specific reasons, once he believes an argument himself, not a thing you can rely on if you don't trust yourself to decide. (Which, I'm told, makes sense to do?? what else??* and would probably have been half the impressive thing anyway, that he considers things himself.) But I haven't noticed that towards anyone, really, his depression's a different shape; less 'my priorities are secretly horrible and I'm making the world worse by doing anything' and more 'existing is horrible and I'm so tired of dealing with it', and a different flavour of blaming himself even when he does.

However, it's a really quite incredible shiny aspect of their relationship, that they both have deeply-held values they care much more about than about the other person, had been prepared to kill the other person if it seemed necessary, and there's common knowledge of that fact… And Leareths specifically do considered consistent things, you can't social-pressure them into being nice to you, it's pretty darned clear that they're willing not to be! So, if they are, they're doing that on purpose and endorse it.

And this detail makes it possible to answer one usual strain of scrupulosity-thoughts — caring about me is distorted priorities, I'm horrible for making you care, if you listen to anything I ask of you or spend any resources on me it's bad for the world — with, nope I checked. And you can trust that because either answer is thinkable, they could conclude it's not worth it, and it's just that it is, actually…