Anyone playing Honkai: Star Rail who is unfamiliar with Mihoyo's (AKA Hoyoverse's) previous works has likely already gotten a headache from all their absurd names for everything. For example, characters don't have passives, instead, they have Eidolon Resonances which are just passives by a different name. A lot of the game's Material, Equipment, and Skill names follow this same pattern, and it can make things confusing. Eidolon Resonances, in particular, are Honkai: Star Rail's version of additional Passive abilities for characters obtained multiple times from the gacha-based Warping system.
In Genshin Impact this same mechanic went by the name Constellations, and in both games, some of these additional passive abilities can skyrocket a character from just 'pretty good' to 'absurdly overpowered'. So, let's take a look at some of the Eidolon Resonances that are the absolute best to keep in mind when players are rolling on specific banners or just rolling for characters in general.
It's not recommended to try and 'roll' for multiple copies of characters intentionally, especially 4-Star Characters as it's literally a low-odds gamble. But, it's worth keeping these Eidolons in mind if players do happen to get lucky with their Warps.
Preservation Path Traiblazer
First up, let's talk about by far the easiest Eidolons to get, the ones for the Trailblazer. Both the Physical and Fire Trailblazer (AKA the Destruction and Preservation Paths) have Eidolons that can be bought from the World Stores.
The Physical Trailblazer uses the Shadows of Destruction bought from Wen Shiqi in the Herta Space Station's Master Control Zone while the Fire Trailblazer's Shadows of Preservation are bought from Pawnbroker Handian in the Central Starskiff Haven of the Xianzhou Luofu. Because these Eidolons are unlocked just from grinding some unique World currencies, there's little to no reason to ignore them.
Jing Yuan
Moving on to the Eidolons that actually take pulling multiple copies of the same character, let's start with someone newer AKA Jing Yuan. Jing Yuan has some pretty good Eidolons overall but his E1 is by far the most noticeable jump in raw damage, especially AoE damage. So, if players somehow manage to get lucky and get two Jing Yuans the next time a banner for him comes around, know that his Slash, Seas Split E1 Resonance makes a big difference.
Natasha
Getting 6 copies of Natasha may seem impossible, but plenty of people have somehow already done it. And, when they do and activate her E6 called Doctor's Grace, Natasha suddenly goes from a useful healer to a Physical Damage Bruiser who also happens to heal. Before this Resonance is activated, Natasha can barely inflict damage at all. Afterward, she almost becomes a Physical-type DPS.
Of course, as a secondary option for those who don't manage to nab 6 Natashas, her E1 Resonance called Pharmacology Expertise is also worth keeping in mind as it makes it much easier for her to last through fights while being targeted with the big self-heal she gives herself at low health.
Bailu
As for the other healer in HSR (not including Luocha quite yet as he isn't out at the time of writing this), Bailu also has a great Eidolon to keep in mind. Though, as a 5-Star character, getting 3 copies of her will prove to be pretty difficult and is even less recommended for players to try and 'attempt' intentionally.
But, if players happen to pull this off and get her Sylphic Slumber E2 Resonance activated, they'll notice a big jump in her healing output overall thanks to how often she's using her Ultimate.
Dan Heng
In the 1.1 version of Honkai, there are only a few options when it comes to Wind damage in the game (though more options seem to be on the way). Players can either rely on pulling Sampo and using him, they can cross their fingers and hope to get Bronya (who doesn't really even specialize in Wind DPS), or they can rely on Dan Heng, a character who they'll have by default.
Most tend to choose option 3, and for good reason, Dan Heng is a pretty good DPS, all things considered. But, if players happen to reach his E4 Resonance called Roaring Dragon and Soaring Sun, this quiet boy with a mysterious past suddenly jumps from 'pretty decent' to 'straight-up amazing'.
Tingyun
Tingyun is already an amazing support character even with a poor character build thanks to her Benediction attack buff and her ability to recharge ally Ultimates. But, the more Eidolon Resonances she activates, the bigger jumps she makes up the hypothetical 'tier list' of characters.
And, unlike some other characters who have a few good Resonances, every Resonance is huge for Tingyun. But, overall, her E1 called Windfall of Lucky Springs is both the most realistic for people to actually obtain and has one of the larger immediate effects of making her Benediction target even better.
Sushang
Sushang's whole Sword Stance mechanic can make her a very powerful anchor DPS if used and leveled properly. But, it's a bit of a Skill Point sink, and that's sort of by design. However, if players manage to pull just two copies of Sushang total and activate her E1, then they can use Weakness Broken enemies to build up her Sword Stance without wasting any Skill Points at all.
Qingque
Honestly, the three final Eidolon Resonances that Qingque activates AKA her E4, E5, and E6 are what propel her from mediocre to just an 'okay' DPS to one of the best in the game. Before activating those, players need to invest a lot of time, effort, and Materials into this character and her Light Cone.
That said, even with just her E4 Resonance known as Right on the Tiles activated, Qingque's damage output jumps up by an incredibly large amount.
Hook
Hook is one of four Destruction Path characters in the game at the moment, and she's probably the one most tailored toward single-target DPS, with the right Light Cone equipped at least. Her main mechanic involves Burning enemies often and then using the 'Her! Remember Hook?' Skill to inflict extra DoT damage each turn.
And, with her E2 Resonance that goes by the silly name of Happy Tummy, Happy Body, this cycle of Burning and re-attacking enemies with Burn becomes a lot easier to manage because she doesn't have to worry about keeping the Burns active nearly as often.
Asta
And finally, let's talk about another Fire-Element character and one of the best supports in the game, otherwise known as Asta. When it comes to Asta, it's all about keeping her stacks of Charging active, as this is what makes her a character who buffs the damage and speed of the whole team both passively and actively throughout a fight.
But, maintaining this Buff means dedicating a lot of Skill Points to her so that she can use Meteor Storm Skill to keep all her stacks of Charging at max. However, with her Moon Speaks in Wax and Wane E2 Resonance, Asta doesn't need to constantly worry about those Stacks nearly as often.
Honkai: Star Rail is available now for Android, iOS, and PC. A PlayStation 5 version releases in Q4 2023.