Fionn O'Brien (Addams)

## Fionn Niall O'Brien

Fionn Niall O'Brien (pronounced Fee-on Nile) is the conjoined triplet of Callum and Griffin O'Brien and the elder brother of Grady, Tiernan, and Lachlan O'Brien. He's the son of Ilvermorny Potions Professor Fiona O'Brien née Griffin and the late Tiernan O'Brien.

Alongside his two brothers, Fionn works in the main library at Ilvermorny School of Witchcraft and Wizardry as an Assistant Librarian.

As a teenager, Fionn and his brothers had a magical creature inheritance, becoming the goat part of a Chimera, and are members of Luke Addams's pack.

Fionn and his brothers are the imprinted mates of two other sets of conjoined triplets, Weston, Paxton, and Easton Wilkinson, collectively known as Rome, and Atticus, Lysander, and Ulysses Picquery, collectively known as Pick.

## Biography

### Early Life (1970-1981)

Fionn was born on March 17, 1970, alongside his triplet brothers, Callum and Griffin, in Dublin, Ireland. What sets him and his brothers apart from most sets of identical triplets, however, is that they're conjoined. Fionn and his brothers share a single three-headed body between them.

In 1972, after his mother, Fiona, secured a job in the Potions Department at Ilvermorny, his parents decided to move from Dublin to Mt. Greylock, Massachusetts. Fiona, a muggleborn witch, had originally wanted to teach at Hogwarts, her alma mater, but she changed her mind when her favorite uncle was killed in a Death Eater raid of a muggle village in 1971. It was then that she and her husband agreed that a change of scenery was in order and it would be safer for them and their family to put an ocean between themselves and Lord Voldemort and his Death Eaters.

After the move to Mt. Greylock, the O'Brien family expanded when Fiona went into labor on the evening of New Year's Day 1976 and gave birth to son Grady early the next morning. Fiona found out she was pregnant again the day before Fionn's sixth birthday. The family's happiness wouldn't last, however, as in late October, Fionn's father had gone back to the UK to help his elderly parents move from their flat above Flourish and Blott's on Diagon Alley to Mt. Greylock. Unfortunately, just after they'd sent the last of the luggage through the Floo, the Death Eaters launched an attack on the Alley. Sending his parents through the Floo, Tiernan, who'd since become an Auror at MACUSA, headed downstairs to the bookshop below where one of his oldest and best friends was the manager. Tiernan hoped to grab his friend and flee through the Floo, but they never got the chance as one of the Death Eaters sent a Blasting Curse through the bookstore's front window, killing both Tiernan and his friend.

Fiona went into early labor two days later when it was confirmed that her husband had died in the attack. She was only a little over seven months pregnant at the time and there was some worry about whether or not the baby would survive born prematurely. Thankfully, the baby, another son, pulled through and Fiona named him Tiernan in honor of her late husband.

Years earlier, shortly before finishing Hogwarts, Fionn's father had both of his testicles removed after he was diagnosed with testicular cancer. He did have some of his sperm frozen, however, and it was actually through the frozen sperm that Fionn and all of his brothers were born. Following her husband's death, Fiona forgot about it until the facility it was stored at contacted her in 1979 to ask what should be done with the one remaining sample. With the blessings of her parents-in-law, Fiona who had never remarried after her husband died, but had also always wanted a daughter decided to use the sample.

Fionn didn't get the sister that his mother was hoping for, but that doesn't mean that son Lachlan, born in 1980, is any less loved.

### Ilvermorny Years (1981-1988)

Fionn and his brothers started at Ilvermorny School of Witchcraft and Wizardry at the age of eleven on September 1, 1981. In the Sorting Ceremony, both the Horned Serpent and Wampus totems reacted to them. Due to their love of reading and learning, the triplets unanimously chose Horned Serpent.

On their birthday at some point during their years at Ilvermorny, Fionn and his brothers underwent a magical creature inheritance with both Fionn and his brother Callum becoming Omegas, while Griffin became an Alpha. Fionn and his brothers are a Chimera, with Fionn being a goat, while Callum is a lion and Griffin is a Hungarian Horntail dragon.

Fionn and his brothers were prefects in their fifth through seventh years, and shared one of the Horned Serpent Deputy Head Boy slots in their sixth year, and one of the Horned Serpent Head Boy slots in their seventh.

### After Ilvermorny (1988-present)

After graduating from Ilvermorny, Fionn and his brothers got their Masteries in their favorite subject Magical Research and Archiving... surprisingly exactly nobody that knows them.

Despite being afraid of Ilvermorny Head Librarian Madam Edna Bates (as most students at Ilvermony are), Fionn and his brothers never had any problems with her because of their love of books. So, when they were hired as Assistant Librarians under Madam Bates, they were thrilled to have a job involving books, but also determined to keep their heads down and stay out of the Head Librarian's way... and above all not do anything that would turn her wrath upon them.

## Physical Appearance

Fionn has brown hair and gray eyes. He shares a single, lean muscular, three-headed body with his brothers, Callum and Griffin. Fionn controls their right arm and hand.

Fionn's eyes can glow gray in human form, and both of their creature forms, due to being an Omega. Callum's eyes glow the same color since he too is an Omega, while Griffin's eyes, as an Alpha, glow red.

In one of their two creature forms, they can take on the form of a bipedal Chimera with a still mostly human looking body, only with the heads of a goat, lion, and Hungarian Horntail dragon replacing their human heads. In this form, they also gain lion's claws on the ends of their fingers, as well as the tail and wings of a Horntail.

Their second creature form is the more fearsome Alpha Chimera, achieved only by Griffin asserting his dominance over Fionn and Callum and taking complete control of their shared body. In this form, they turn into a large quadrupedal mashup between a goat, a lion, and a dragon. They have the heads of a goat, a lion, and a dragon, the hind legs and hooves of a goat, the front legs, paws, and claws of a lion, and the tail and wings of a dragon. Their overall size is affected by there being only one Alpha and two Omegas in their trio, which puts them at about a third of the size of a full-grown male adult Hungarian Horntail.

## Personality and Traits

Highly intelligent, Fionn and his brothers are what some might call a teacher's pet. They have a nearly insatiable thirst for knowledge and practically worship books, although they are smart enough to not believe everything they read and to always check multiple sources. They've been described as a Horned Serpent on steroids and that is not untrue, as there have been times when they've gotten so engrossed in reading or researching a particularly interesting subject or problem that they completely forget to sleep or eat.

As children, they were painfully shy and socially awkward, and had difficulty making friends as a result. However, their dorm mates, as well as Tripp, Rome, and Pick helped them to break out of their shell. They'll never be social butterflys, but they can initiate conversations and talk to people without feeling like they're making complete fools of themselves. They are still, however, slightly wary of spending time among large groups of people that they don't know well enough to call their friends. So if they had to choose a way to spend an evening, they'd prefer a quiet evening at home with their mates or good books over a crowded dance club.

Of course, another reason that they wouldn't enjoy a crowded dance club is because they've been claustrophobic ever since the summer following their first year at Ilvermorny when they got trapped in the elevator of a large New York City department store during a citywide blackout. Stuck alone and in the dark in a small, enclosed space for several hours before the power came back on stuck with them and ever since they avoid elevators and other small, enclosed places like the plague.

## Abilities and Skills

### Regular Abilities and Skills

Fionn and his brothers, while not quite as athletic as some other students, in that they didn't go out for six different sports, did still go out for one each semester after some urging and encouragement from Tripp, Rome, Pick, and their dorm mates.

* **Quidditch:** Played seeker on Horned Serpent's JV quidditch team during the fall semesters of their second through fourth years, and the Varsity team from fifth year onward.
* **Swimming:** Was on Horned Serpent's JV swimming team during the winter semesters of their second through fourth years, and the Varsity team from fifth year onward.
* **Golf:** Was on Horned Serpent's JV golf team during the spring semesters of their second through fourth years, and the Varsity team from fifth year onward.

Besides the sports they played, Fionn and his brothers have a variety of other interests as well.

* **Magical Research and Archiving:** Hands down their favorite subject, as it requires alot of reading, which appeals to their bookworm nature.
* **Magical Literature:** Unsurprisingly, this is Fionn's and his brothers second favorite subject since they all love to read.
* **Organ:** Taking their cue from Tripp and their enjoyment of playing music, Fionn and his brothers began taking organ lessons and have become quite good.
* **Dueling:** Fionn and his brothers are competent duelers and can hold their own against most opponents, especially those that don't have the innate ability of conjoined triplets to cast three spells simultaneously.
* **Languages:** Fionn and his brothers are fluent in English, Irish, Latin, and French, and conversent in Spanish and German. Fionn is also conversant in the Merrow dialect of Mermish.
* **Spellcasting:** In terms of general spellcasting, Fionn is best at defensive and healing spells.
* **Transfiguration:** Fionn is better than his brothers at Transfiguration, and was pretty much always the first among them to successfully cast a new spell in the subject. Fionn often uses this to his advantage by employing Transfiguration in duels.