[HSR 2.4 - BETA] Jiaoqiu (5* Nihility, Fire)

Stats
HP: 1358
Attack: 601
Defense: 509
Speed: 98
Taunt: 100

Ascension Materials: Credit (x308000), Tatters of Thought (x15), Fragments of Impression (x15), Raging Heart (x65), Shards of Desires (x15)

Trace Materials: Credit (x3000000), Tracks of Destiny (x8), Fiery Spirit (x18), Starfire Essence (x69), Heaven Incinerator (x139), Lost Echo of the Shared Wish (x12), Tatters of Thought (x41), Fragments of Impression (x56), Shards of Desires (x58)

Eidolons
Pentapathic Transference: When an ally attacks an enemy target afflicted with Roast the Ash, increases DMG dealt by 48%. Each time the Talent triggers Roast the Ash, additionally increases the present Roast the Ash stacks by 1.

From Savor Comes Suffer: The Ashen Roast state can be seen as a Burn state. Each stack of Ashen Roast will deal Fire DoT equal to 300% of Jiaoqiu's ATK at the start of the enemy's turn.

Leisure In, Luster Out: When the Field exists, reduces enemy target's ATK by 15%.

Nonamorphic Pyrobind: When the enemy target is defeated, existing Roast the Ash stacks will be transferred to a surviving enemy with the lowest amount of Roast the Ash stacks. Increases max Roast the Ash stacks to 9. Every stack of Roast the Ash will reduce all enemies' All-Type RES by 3%.

Traces
Stats Effect Hit Rate 28%, Fire DMG Boost 14,4%, SPD 5

Pyre Cleanse: When a Field exists, the enemies' Effect Hit Rate is reduced by**30%. At the start of each turn, they receive Fire Additional DMG equal to **150% of Jiaoqiu's ATK.

Hearth Kindle: When Jiaoqiu's Effect Hit Rate is higher than 80%, for each 15% exceeded, Jiaoqiu additionally gains 60% ATK, up to a maximum of 240%.

Seared Scent: When a Field exists, enemies entering the battle are inflicted with Roast the Ash. The stacks inflicted is the same as the highest stack of Roast the Ash currently afflicting an enemy in the battle, with a minimum of 1 stacks.

Skills
[Basic ATK] Heart Afire
Deals Fire DMG equal to 50% (130%) of Jiaoqiu's ATK to a single enemy.

[Skill] Scorch Onslaught
Deals Fire DMG equal to 90% (225%) of Jiaoqiu's ATK to a single enemy and Fire DMG equal to 45% (112%) of Jiaoqiu's ATK to enemies adjacent to it. Has a 100% base chance to inflict 1 stack of Roast the Ash on the primary target.

[Ultimate] Pyrograph Arcanum

Cost: 100 energy.

Sets the number of "Ashen Roast" stacks on enemy targets to the highest number of "Ashen Roast" stacks present on the battlefield. Then, activates a Field and deals Fire DMG equal to 120% (240%) of Jiaoqiu's ATK to all enemies.
While inside the field, enemy targets take 9.0% (18.0%) increased Ultimate DMG, with a 50% (65%) base chance of being inflicted with 1 stack of Ashen Roast when taking action. This effect can only be triggered once for enemies in each turn.
The Field lasts for 3 turn(s), and its duration decreases by 1 at the start of this unit's every turn. If Jiaoqiu is knocked down, the Field will also be dispelled.

[Talent] Quartet Finesse, Octave Finery
When Jiaoqiu uses his Basic ATK, Skill, or Ultimate to hit an enemy, there is a 100% base chance of dealing 1 stack of Roast the Ash, increasing the initial DMG enemies receive by 7.5% (18.8%), with each stack additionally increasing DMG by 2.5% (6.2%) to a max of 5 stack(s). Roast the Ash will last 2 turn(s).

[Technique] Fiery Queller
After using Technique, creates a special dimension that lasts for 15 second(s). After engaging enemies in the dimension, deals Fire DMG equal to 100% of Jiaoqiu's ATK to all enemies and has a 100% base chance of applying 1 Roast the Ash stack. Only 1 dimension created by allies can exist at the same time.

[HSR 2.4 - BETA] Those Many Springs (5*, Nihility)

Stats
HP: 952
ATK: 582
DEF: 529

Materials: Credit (x385000), Tatters of Thought (x20), Fiery Spirit (x4), Starfire Essence (x12), Fragments of Impression (x20), Heaven Incinerator (x15), Shards of Desires (x14)

Worldly Affairs Leave No Mark: Increases the wearer's Effect Hit Rate by 60% (100%). If the target is not under the Unarmored effect dealt by the wearer, when the wearer uses a Basic ATK, Skill, or Ultimate on enemy targets, there is a 60% base chance to inflict Unarmored to the enemy. Under the Unarmored state, the target enemy's DMG received is increased by 10% (18%), lasting for 2 turn(s). When the wearer deals DMG to an enemy with the Unarmored effect inflicted by themselves, there is a 60% base chance to escalate the Unarmored state from them into the Cornered state, which increases the target enemy's DMG received by 18% (30%).

[HSR 2.4 - BETA] Yunli (5* Destruction, Physical)

Stats
HP: 1358
Attack: 679
Defense: 460
Speed: 94
Taunt: 125

Ascension Materials: Credit (x308000), Dream Collection Component (x15), Dream Flow Valve (x15), IPC Work Permit (x65), Dream Making Engine (x15)

Trace Materials: Credit (x3000000), Tracks of Destiny (x8), Borisin Teeth (x18), Lupitoxin Sawteeth (x69), Moon Rage Fang (x139), Lost Echo of the Shared Wish (x12), Dream Collection Component (x41), Dream Flow Valve (x56), Dream Making Engine (x58)

Eidolons
Weathered Blade Does Not Sully: DMG from Intuit: Slash and Intuit: Cull increases by 20%, and Intuit: Cull's extra DMG Hits increases by 3.

First Luster Breaks Dawn: Yunli increases her own CRIT Rate by 18% at the end of the turn, lasting until the beginning of the next turn.

Artisan's Ironsong: When Yunli deals DMG via launching a Counter, ignores 20% of the target's DEF.

Walk in Blade, Talk in Zither: After using Ultimate, if the next unit to act is an enemy unit, Intuit: Cull will be triggered regardless of whether it is targeting Yunli, and the Block effect provided by the Ultimate will not be dispelled and will last until the end of the next turn. This effect can only be triggered 1 per turn.

Traces
Stats ATK (28%), HP (18%), CRIT Rate (6.6%)

Fiery Wheel: Upon being attacked, Yunli additionaly regenerates 15 extra Energy.

Demon Quell: While in the Block state, resists the Crowd Control debuff received and reduces DMG received by 20%.

True Sunder: When using a Counter, increases Yunli's ATK by 30% for 1 turn.

Skills
[Basic ATK] Galespin Summersault
Deals Physical DMG equal to 50% (130%) of Yunli's ATK to a single enemy.

[Skill] Bladeborne Quake
Restores HP equal to 20.0% (35.0%) of Yunli's ATK plus 50 (256), and deals Physical DMG equal to 60% (150%) of Yunli's ATK to a single enemy and Physical DMG equal to 30% (75%) of Yunli's ATK to enemies adjacent to it.

[Ultimate] Earthbind, Etherbreak

Cost: 120 energy.

Consumes 120 Energy. Yunli gains Block and Taunts all enemies, lasting until the next turn of an allied or enemy unit. While Block is active, Yunli's CRIT DMG increases by 60% (120%). When the Counter Talent effect is triggered while Block is active, it will be switched to a Counter Intuit: Cull effect and also dispel Block. If Counters are triggered while Block is active, when the effect ends, Yunli will immediately launch a Counter Intuit: Slash effect on a random enemy target. When an Intuit: Slash is inflicted, it will cause the next Intuit: Slash to become an Intuit: Cull.
Intuit: Slash: Deals Physical DMG to the target equal to 144% (288%) of Yunli's ATK, and deals Physical DMG to adjacent targets equal to 72% (144%) of Yunli's ATK.
Intuit: Cull: Deals Physical DMG to the target equal to 144% (288%) of Yunli's ATK, and deals Physical DMG to adjacent targets equal to 72% (144%) of Yunli's ATK, and then additionally deals 6 hits of DMG. Every hit of DMG deals Physical DMG equal to 48% (96%) of Yunli's ATK to a random single enemy target. When Yunli deals DMG through this ability, it will be viewed as Ultimate DMG.

[Talent] Flashforge
When Yunli is attacked by an enemy target, immediately launches a Counter on the attacker, dealing Physical DMG equal to 60% (150%) of Yunli's ATK, and Physical DMG to adjacent targets equal to 30% (75%) of Yunli's ATK.

[Technique] Posterior Precedence
Gains the Ward effect for 15 seconds. When entering combat by attacking enemies or receiving an attack, immediately inflicts Intuit: Cull on a random enemy target, and increases this attack's DMG by 80%.

[HSR 2.4 - BETA] Dance at Sunset (5*, Destruction)

Stats
HP: 1058
ATK: 582
DEF: 463

Materials: Credit (x385000), Dream Collection Component (x20), Borisin Teeth (x4), Lupitoxin Sawteeth (x12), Dream Flow Valve (x20), Moon Rage Fang (x15), Dream Making Engine (x14)

Deeply Engrossed: Greatly increases the odds that the wearer will be attacked, increases the wearer's CRIT DMG by 36% (60%). After the wearer uses their Ultimate, they receive 1 stack of Firedance, lasting for 2 turns and up to 2 stacks. Each stack of Firedance increases the DMG dealt by the wearer's follow-up attack by 36% (60%).

Some kit clarifications;

Jiaoqiu E2 - Stacks are not mentioned. Only says "Take Fire DMG equal to 300% per turn"

Yunli Ult - If counters are triggered while Block is active... -> If counterattack is NOT triggered while Block is active...

In the game there will be some kind of comic that features March's training. I'm gonna add my favorite images here and the rest in an album.

Album: https://imgur.com/a/FhaFdaq