An Angel+Demon protagonist works especially well for a multiverse setting because it naturally explains contradictions: holy power and infernal power, creation and destruction, compassion and predation. Your setup leans more toward a "Transcendent Devil King" archetype than a pure antihero.
Here's a structure that keeps the character powerful while still interesting.
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Core Concept
True Nature
A primordial hybrid born from:
a fallen celestial lineage
and an abyssal/devil bloodline
Instead of being "half angel, half demon" biologically, make it metaphysical:
the Soul is angelic
the Core/Instinct is demonic
That avoids the cliché weakness of "two sides fighting each other" and instead creates evolution through balance.
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Main Goals
1. Become a Demon Lord / God
Not just ruling Hell.
The real goal:
transcend systems
become an existence independent of Heaven, Hell, Fate, and Worlds
Titles:
Abyssal Seraph
King of the Ninth Heaven
Sovereign of the Void
Demon God of Evolution
The Black Star
The First Nephilim
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2. Devour Souls
This becomes the primary growth mechanic.
But instead of random evil:
souls contain memories
power systems
affinities
emotions
concepts
So devouring:
angels grants divine authority
devils grant demonic evolution
magicians grant knowledge
monsters grant biological traits
You can also make it selective:
> He prefers corrupted souls, tyrants, ancient beings, and monsters.
That keeps him morally gray instead of purely monstrous.
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Main Ability System
Angel Side
Focus:
authority
purification
light
dimensional stability
resurrection
soul protection
Abilities:
Wings of Judgment
Divine Language
Reality Seals
Heavenly Flame
Time Slow
Soul Reconstruction
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Demon Side
Focus:
adaptation
destruction
evolution
predation
corruption
Abilities:
Soul Devour
Abyssal Regeneration
Demon Forms
Fear Aura
Sin Magic
Shadow Dominion
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True Hybrid Power
The fusion abilities should be unique.
Examples:
Holy Hellfire
Fallen Divinity
Corrupted Miracles
Abyssal Creation
Absolute Authority
Genesis of Demons
A signature power could be:
"World Seed"
Every soul devoured adds energy toward creating a personal dimension.
Eventually:
continents
species
laws of reality
mana systems
civilizations
This perfectly matches:
> Create Own World
Your world can evolve from:
pocket realm → kingdom → hell dimension → full universe
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Personality Direction
Your goals actually fit a surprisingly calm protagonist.
Not:
chaotic evil
screaming conqueror
More:
relaxed cosmic predator
polite devil king
someone who wants comfort, freedom, good food, companions, and absolute security
Think:
Lucifer Morningstar charisma
Anos Voldigoad confidence
Rimuru Tempest kingdom building
Dante style
Alucard monstrosity
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Multiverse Integration
Supernatural
Best source for:
primordial entities
soul magic
cosmic hierarchy
alternate dimensions
Possible role:
born before angels knew free will
older than most demons
rival to Death/The Empty
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Shadowhunters
Best source for:
rune systems
angelic weapons
demon dimensions
You could become:
forbidden nephilim prophecy
creator of dark runes
successor to both Raziel and Edom
Magnus Bane-type alliances work extremely well here.
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The Seven Deadly Sins
Best source for:
demon king evolution
commandments
holy/demonic balance
You could absorb:
Grace
Commandments
Chaos fragments
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Diablo IV
Perfect for:
hell kingdoms
soul consumption
demon politics
Could become:
independent Prime Evil candidate
rival to Lilith
creator of a new Hell faction
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Devil May Cry 5
Great aesthetic inspiration.
Your hybrid transformation could resemble:
Sin Devil Trigger
angel-devil armor
living wings/blades
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High School DxD
Excellent for:
sacred gear concepts
devil peerage systems
dimensional factions
Your existence would terrify all factions because:
angels see corruption
devils see divinity
dragons sense transcendence
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The Order / Hell Dimension Idea
The Order actually works surprisingly well as a lower-tier magical world.
You can use it as:
first kingdom
experimental dimension
hidden demon academy
soul farm
gateway nexus
Eventually it becomes your personal Hell.
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Comfortable Life Goal
This is what makes the character fun.
Despite cosmic ambitions:
loves modern luxuries
builds peaceful sanctuaries
collects companions
creates cities where monsters and humans coexist
avoids unnecessary wars
Very "retired god who occasionally destroys civilizations."
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Fated Companions
Aurora Decker-Morningstar
Best role:
fate-bound equal
celestial counterpart
stabilizes divine side
She fits extremely well because of:
angelic heritage
rebellion themes
destiny paradoxes
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Charlie Morningstar
One of the strongest thematic matches.
Why:
redemption vs predation
optimism vs pragmatism
Hell royalty
She could influence:
your morality
kingdom building
demon society reform
Or eventually evolve into a terrifying queen beside you.
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Alas Ramus
Making her an adult future version works best if:
she becomes a fragment/incarnation of Yesod
embodiment of purity
world-heart spirit
She'd represent:
peace
home
emotional anchor
Rather than romance alone.
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Final Evolution
Instead of merely becoming stronger: the character eventually becomes:
"A Living World"
A singular existence containing:
heaven
hell
souls
laws
species
civilizations
dimensions
Not a ruler of a world.
The world itself.