A/N – So this is a Dragon Age crossover idea, but other than her past, race, and magic, there won't be a huge aspect of Dragon Age to this. I will go into Inquisition, but it will be a stand-alone book and the AOT side can be read without Inquisition.

- All characters of the Trainee Corps are aged up so that they are 18 at the point of graduation. I think it works out as +3 years.

.....

Birth Name: Nerien

'Adopted' Name: Nerien Jaeger

Nickname: Neri (Most)

DOB: Unknown

Age:

12 (845)

14 (847)

- Neri will lie about her age to join Mikasa, Eren, and Armin and the Training Corps. Though there will be some, like Keith Sadies who know her true age but allow it anyway. (15 is the enlistment age so she's not that far off)

- Neri will spend a year in Thedas during the three years with the Training Corps but will only be gone a few weeks meaning she ages a year with those weeks.

18 (850)

22 (854)

Appearance:

Species: Elvhen (Elf)

- As elves do not exist in the AOT world; most assume she is human with pointed ears; even Nerien who has little memories from her early life, believes this.

Height: 5ft 8

Skin: Toned

Hair: Red

Eyes: Grey-Green

Notes (Pre-Graduation): Neri often wears a hood to hide her ears, though most people in Shiganshina know of those features and have gotten used to seeing them.

Notes (Post-Thedas): She wears a v-shaped forehead headband. 

Class: Mage

Weapon: Sword

Specialisation: Veil Mage

Future Specialisations: Spellsword

- Nimbler and more athletic than the mage, and better suited for spell-casting than a soldier, the attacks of a Spellsword are unpredictable. Spellswords are great students of combat and magic. Serving as warrior-mages, they dedicate their lives to learning both the art of war and the ethereal ways of power.

Birthplace: Skyhold

Current Home: Shiganshina District

Eventual Residence: Wall Rose

Family:

Grisha Jaeger (Adopted Father)

Carla Jaeger (Adopted Mother)

Eren Jaeger (Adopted Brother)

Mikasa Ackermann (Sister Figure)

Zeke Jaeger (Adopted Brother)

Jaeger (Adopted Grandfather, deceased)

Unnamed Adopted Grandmother (deceased)

Fay Jaeger (Adopted Aunt, deceased)

Unnamed Adopted Maternal Grandparents

Ladanelan (Biological Mother; deceased)

Solas (Biological Father)

Bio:

Not much is known about Nerien's early life, other than she was born to Solas and Ladanelan in Skyhold where she spent the first five years of her youth with her deeply loving and encouraging parents who doted on her completely.

At five years old, Nerien had to watch her mother be murdered due to her father's rebellion against the Evanuris and Nerien herself was captured the false gods.

Word reached Solas who immediately set about organising a rescue attempt. But by the time he reached his daughter, she was gone. Vanished.

In reality, Nerien had wrapped herself in magic, and teleported across worlds to save herself.

- Meeting Grisha Jaegar:

Nerien reappeared within Wall Maria unconscious and bleeding but alive. She was found by Keith Sadies who rushed her to Grisha Jaegar for help.

Grisha then unofficially adopted Nerien into his family, raising her alongside his young son, Eren.

- Mikasa Joins the Family:

Some years later, Grisha returns to Shiganshina with Eren after visiting a patient and has Mikasa, a young girl, in tow. After the murder of her parents, Mikasa was invited to join the family.

Personality:

Nerien is a very kind, loving, compassionate, and strong-willed person. Growing up, Nerien also proved herself headstrong and determined to do what she wanted. She is quite stubborn; if she believes something is the right thing to do, then she will do it.

Even alongside all of her kindness, compassion, and empathy, Nerien is still also a warrior at heart, and when someone she cares about is hurt, becomes far more relentless and ruthless. Outside of battle, however, Nerien can also react indigently and negatively towards people who disrespect her, Eren, Mikasa, or those she cares about. Nerien also remains ruthless when facing enemies in battle, and she even shows signs of enjoying a good battle when they put up a good fight. She very much enjoys tackling challenging titans.

"Usually, rules are there for a reason, and observing them is a good thing. But sometimes, it's more important to do what's right." - Nerien to Armin

Still, Nerien ultimately has a very strong regard for life and humanity.

While she is a proud person, she is not above admitting when she has done wrong.

Most of all, Nerien is a protector at heart and will do whatever she has to do to save the ones she loves.

Nerien is sympathetic and attached to people she keeps close as seen with Eren, Mikasa, and Armin

She prefers to take on all tasks and risks herself even when those around her are willing to join her.

Considered stubbornly independent, she also claims to not be fond of surprises but given the world she lives in, this is hardly surprising.

Powers and Abilities:

Magic:

- Her magic has a green energy to it, similar to the green glow of the Fade, even when casting fire or lightning spells, these appear green in nature, it is likely because she is the daughter of an ancient elvhen.

- Nerien doesn't make use of a staff. She can make simple gestures with her hands to cast.

- Her magic seems to react as an extension of Nerien, more so than other mages and magic, likely because of her upbringing.

- Solas will note that the way she uses her magic reminds him of the ancient elves and this likely comes from him being her father.

Ancient Mage: Nerien is what is considered an Ancient Mage. 

Ancient Elvhen Magic: Able to harness Ancient Elvhen Magic, Nerien can shape and manipulate this magic for different effects, such as forming tangible constructs of energy or casting spells.

Teleportation: Nerien is able to teleport herself over short distances, usually around battlefields, but she is capable of teleporting other people too, usually to get them out of harm's way. Nerien's teleportation seems to have an insane upper limit as she was able to teleport herself across the multiverse, though she hasn't shown this level of power since she was a child, there is the possibility that she could push herself that far again.

Flyrogenesis: Nerien has the magical ability is to mentally produce force fields, harnessing the Veil and using it to create barriers and fields, which she can make appear in any shape, and with any amount of intensity and force.

- Veil (Full) Shield: Nerien can erect a huge green veil shield that protects against physical and magical attacks.

- Veil (Personal) Shield: Nerien can use a smaller version of her shield to block attacks, this takes less energy but only covers her.

- Veil Shield Blasts: Nerien has the ability to project her veil shields to cause damage to her opponents.

- Veil Shock Waves: Nerien is capable of using her veil shields as shock waves hitting her opponent.

- Enhanced Strength: Nerien can wrap her knuckles in veil shields, so when she punches it feels as if her enemies are being punched by a brick wall. This grants her an enhanced strength strong enough to throw grown men and even enough strength to affect Titans with her fists.

Veil Telekinesis: Nerien has the ability to move, levitate and otherwise manipulate objects using her magic. Nerien uses this energy to affect and control molecules and particles, allowing her to fully control matter and energy. Nerien started training this power by moving wooden blocks around on Grisha's instruction.

- Push: Nerien can push away foes in battle, this is usually accompanied by a green flash.

Veilfire: Nerien can produce Veilfire.

Veil Lightning: Nerien can produce Veil Lightning. Nerien has a fondness of lightning and will reach for those spells first before any others.

- Because of her being a Veil Mage, accessing these spells produces green results, her lightening is green, her fire is green, etc.

Abilities:

- Whilst she is still young and unskilled (except for some of her magic) at the start of this, her time with the Trainee Corp and her time with the Survey Corps will transform Nerien into a formidable mage and warrior.

Master swordsman: Nerien is highly proficient in swordsmanship and prefers to use her sword in battle alongside her magic.

Acrobatics/Free-running: Nerien is very manoeuvrable and graceful, able to chase and outrun enemies through various terrains with no wasted effort or time, even scaling buildings and running from rooftop to rooftop with ease. In battle, she is proven very agile and evasive, able to fluidly dodge attacks from multiple directions with coordinated flips, twists, and sharp turns without losing balance.

Honed senses: Nerien is able to pick up danger before anyone else in her vicinity does. Her keen skills of perception offer aid in otherwise detrimental situations. She is likewise able to anticipate attack patterns.

Master hand-to-hand combatant/Martial artist: Nerien is an exceptionally skilled hand-to-hand combatant and martial artist, allowing her to compete with and defeat some of the most dangerous combatants one-on-one. She is very flexible and precise in her manoeuvrers, able to change her battle tactics and attack patterns to suit the situation at a fast rate, allowing her to take on and defeat multiple fighters of advanced fighting prowess and enhanced/powered individuals.

Equipment:

Armor (eventually): Nerien will wear a unique piece of armour following her return from Thedas. She will top this with the Scout Corps cape once she graduates and joins them.

- This is made of a combination of Silken Nether Cloth, Avvar Twill, Dragon Webbing, Imbued Tusket Hide and Veil Quartz.

Sword (eventually): Nerien wields a sword in battle following her return from Thedas, made of veil quartz and is stronger and more resilient than ultrahard steel. Unlike the ODM equipment, she has no need to replace the blades when used against the Titans. 

Necklace: Nerien wears a double v design necklace, gifted to her by Solas when she was a child.

Ring #1: Nerien wears a double v-design ring, given to her by Ladanelan.

- As the necklace and ring share the same symbology, it is likely a family sigil. Whilst in Thedas, she will create a headband to match. 

- Because of her teleportation spell, she has no need to use the ODM for traversal. 

Love Interest: Jean Kirschtein

- Though I also love the idea of her with Erwen Smith. (I would make her slightly older, maybe leave her in Thedas longer to cover Trespasser (so 3 years instead of 1) and then bring her back; if this is the case, then maybe I would make her the Herald. They would have that in common with the whole loss of limb thing)

- If Erwin for Nerien, I would change Asahi to Jean and adapt that to fit better for him.