In future you will be able to "transfer" your account. Most likely its a cross region account transferring but im not sure for now.
Transfer will take some time. Your account will be "banned" until the end of transfer.

In 5.1 we will be able to play as Mavuika in archon quest.
Dont know if we will be able to use her skills or it will be just her POV of story.

[HI3 - 7.8 BETA] Vita Splashart

[HI3 - 7.8 BETA] Vita Animations V1

As I said I'll follow up, some changed too.

I'll redo it in a better stage in a bit since one or two animations aren't well shown here.

[HI3 - 7.8 BETA] Kiana Divine Key V1

This is Ultimate during Astral Ring.

New song spotted in Honkai beta files

[HI3 - 7.8 BETA] Vita Weapon

ATK: 441
CRIT: 19

Active Skill
[SP: 0] [CD: 0s] The weapon active's CD, max charges, and effects are based on the wielder's type. When a character with Rite of Oblivion is on the team, character deals 20.0% more Total DMG. When equipped by Vita, the enhanced Basic ATK SEQ 3 in Normal Form and Enhanced Form deals 300.0%/500.0% ATK of Lightning DMG (considered Basic ATK DMG). When entering battle, consuming Stellar Drain for the first time with a Combo ATK restores 15 bonus Astral Ring Intensity. Disabled upon activating Stellar Outburst.

Passive 1
Character deals 35.0% more Lightning DMG. When equipped by Vita and Astral Ring is activated: Enemies take 25.0% more Total DMG from the character, and all team members deal 10.0% more Elemental DMG and Physical DMG.

Passive 2
Enemies take 32.0% more Lightning DMG from the character. When equipped by Vita and Astral Ring is activated, enemies on the field take 5.0% more Total DMG.

Synergy
Enemies take 2.0%/4.0%/6.0% more Total DMG from characters on the field (independent). When equipped by Vita, increases initial SP by 0/0/0.

[HI3 - 7.8 BETA] Vita Stigmata

Vita (T)

HP: 371
ATK: 113
DEF: 77

Character deals 40.0% more Lightning DMG.
When equipped by Vita: Characters with the [Vita Buff] deal 30.0% more Elemental DMG.

Vita (M)

HP: 434
ATK: 0
DEF: 236

Character takes 20.0% less damage.
When equipped by Vita: Characters with the [Vita Buff] deal 15.0% more Elemental DMG.

Vita (B)

HP: 388
ATK: 59
DEF: 86

Character deals 30.0% more Total DMG.
When equipped by Vita: Characters with the [Vita Buff] deal 7.0% more Physical DMG.

Set: Vita Set

2pc
Character's Basic/Combo/Charged ATKs deal 20.0% more Total DMG.
When equipped by Vita:
Enemies take 30.0% more Lightning DMG from the character. Characters with the [Vita Buff] deal 20.0% more Total DMG.

3pc
Character's Ultimates deal 40% more Lightning DMG. When equipped by Vita:
●With Astral Ring activated:
○All team members gain [Vita Buff].
○Vita deals 50% more Lightning DMG.
○Enemies take 15.0% more Elemental DMG and 7.0% more Physical DMG from all team members, and are inflicted with 10.0% increased Total Vulnerability.
●With World Star activated:
○During Astral Ring Charging:◆Enemies take 15% more Elemental DMG and 15% more Total DMG.
●With Wheel of Destiny activated:
○During Stellar Outburst:◆Enemies take 15% more Elemental DMG and 15% more Total DMG.

[HI3 - 7.8 BETA] Kiana Divine Key

ATK: 436
CRIT: 15

Active Skill
[SP: 0] [CD: 0s] Launch an attack that shoots through the stars, dealing 600.0% ATK of Fire DMG. Herrscher of Finality equip bonuses:
Activates Astral Ring: Rite of Oblivion.
Casting Weapon Skill grants 3 [Descent] and changes attack moves:
In [Time Flint stance], kick the blade forward to spin through the enemy and explode, dealing 100% + 30% x 12 + 400% ATK of Fire DMG.
In [Moon Blade stance], fire a piercing shot at the enemy, dealing 840% ATK of Fire DMG.
Stellar Outburst bonuses:
During Stellar Outburst, casting Weapon Skill for the first time grants 8 [Descent].
Hold [ULT] to cast [Wink!] and deal 2,500% ATK of Fire DMG. SP: 125. CD: 25s.
After Herrscher of Finality enters Stellar Outburst, Herrscher of Origin and Herrscher of Truth's first Combo ATK deal 1,000% ATK of Fire DMG.

Passive 1
Increases Fire DMG by 30.0%. When equipped by Herrscher of Finality, Combo ATKs deal an additional 150.0% ATK of Fire DMG, and resets Weapon Active CD when it switches between [Time Flint stance] and [Moon Blade stance]. Switching to Finale stance reduces Weapon Active CD by 40%.

Passive 2
Ultimates deal 20.0% more Fire DMG and all team members deal 10.0% more Total DMG.
When equipped by Herrscher of Finality and Astral Ring is activated:
All team members deal 25% more Elemental DMG and 20% more Physical DMG.
Enemies on the field take 15% more Total DMG for 15s when all team members cast Joint Bursting. Retriggering refreshes duration.

Synergy
Increases Total DMG by 5.0%/10.0%/15.0%. When equipped by Herrscher of Finality, all team members deal 5.0%/10.0%/15.0% more Total DMG.