I'm going to tell you each of them, and please hear me out, since you may not like one, but I mean it in a different way
So here they are:
-Wylinh
-Marelinh
-Glam
Wylinh:
Now before you click out of this, I do not mean this romantically. I mean this platonically.
But I hc them as being really close in a brother/sister way.
Think about it - they're a complete comfort to each other.
Linh would make little water animals and shapes to help him find something to focus on, when he was still healing from the Neverseen's attack.
It was clear that she was able to help him through this really tough time, and that they bonded over it.
On Wylie's part, he obviously feels almost protective of her. As seen in Legacy, after he finds out that Sophie had talked to Tam, he opted to go tell Linh, but said that it would be easier for her if it was just him there, since that way, she wouldn't feel like she would have to put up a brave face for anyone else.
This shows that they've gotten to know each other in a way that they feel like they don't need to be brave for each other.
That's why I love it platonically
Marelinh:
Here's the thing, they're actually quite cute romantically, and platonically.
They've obviously been spending a lot of time together, and unfortunately, we only get a few moments between them, but we can see the closeness they feel to each other.
They're getting to know each other quite well, as seen from the fact that they're trying to combine their powers, and that Linh is going to Marella's Fintan lessons.
There isn't much evidence to say that it's particularly healthy, but from what we do have, they depend on each other, spend time together, and just like to be together without many worries about their relationship with others.
Glam
You're probably wondering why this one is final on my list, and you're also probably thinking I'm biased, since I am a Glam shipper.
I'm not trying to be biased as I write this, but I genuinely think it is or has potential to be - from what we've seen - one of the healthiest relationships out of the teenagers, whether it's platonic or romantic.
Let me start by saying, we're going to assume Glimmer is about Tam's age, and isn't a total creep (hey, it's possible -)
Anyway, it starts off with just the inklings of a friendship. Glimmer genuinely seems to be trying to befriend Tam.
So they're just friends right now.
But it's clear that Tam is incredibly protective of her, despite him pushing him away with their time in the Neverseen.
It's also clear that he does trust her, and she seems to trust him (as seen from the line in Unlocked, when she only gives up information after he asks her to, even though his friends were asking, and she wouldn't tell them anything - the whole thing as for him) as well.
Trust is one of the most important things in a relationship, and given that they have a good amount of trust already established in their relationship, they're off to a pretty good start.
Also, a lot of romantic relationships always start off as friends, and eventually grow to be more, which I can really see happening here.
They also obviously tend to have more in-depth conversations.
Hear me out: Even though we only get a few moments between them in his POV in Legacy, it's clear that they've been talking more than just that, and that they've been having conversations about their loyalty, and what's going on from each other's point of views.
So yeah, these are some of the healthiest relationships I truly see within the series, but since I haven't done a real analysis on a whole bunch of them put together, I'm not going to say that they're the only healthy relationships, it's just something I've been wanting to put together for a bit.
There's more to it, if I really thought about it, but I'm kinda tired and my brain is missing stuff, so if you have anything to add, feel free!
Ping list:
@Legacyfosterkeefe @Team Valient @Moonlarktwiceremoved @SD11booklover @SOKEEFEFOREVER1 @TheObliviousWhale @TheRealDmitriVirgilNardyPerson @LesbianCat @SandorsWatchingYou @SparklzRule! @LavenderNerdyAlicorn @WHNutcracker @Azure Bluet @ObsessedFangirl869 @BookBudgie @AnonymousWikiaEditor @Aura.the.black.moonlark @SideCharactersForever @Ayxo16 @TeamDex @DemolitionLover19 @Kitty Kat Chocolate Bar @TeamFosterKeefeIsbetterthanfitzphie @ChesireFox13 @LiaTheHydrokinetic @Sokeefeforever11 @KotLCAwsomeness1 @Trash-binh @TheSilverCrane @BlackSwan0228 @HumansCanWinElves @LizzieTwinMWAHAHA @TheVanillaFountain @HappyGreenElephant @Amelia.Sencen @LittleTigress