Ignis Scientia, previously known as Ignis Stupeo Scientia, is a companion of Prince Noctis and a party member in Final Fantasy XV. Although not directly playable, he can co-opt moves with Noctis and be issued orders.
Ignis wears a purple and black patterned dress shirt with his black suit and black shiny red-soled shoes with sequenced crystals at the tip. He wears shimmery silver driving gloves. He wears glasses and has short, dirty blond hair swept up at the front of his hairline and green eyes. Like all party members, he has some skull-motifs to his outfit, the most prominent being the skull print on the back of his shirt. He also has a skull on his belt buckle and a silver skull pendant.
His casual outfit is either a white long-sleeved dress shirt or a gray t-shirt. He wears gray trousers and has a storage pack attached to his left leg.
Ten years later, he largely had the same attire, although he has replaced his eyeglasses with dark visors and his hair has grown out on the top. He also gains a Kingsglaive uniform.
Ignis has a composed, serious, and cool personality to contrast Gladiolus and Prompto. He received a special education for gifted children to work as a staff officer for Noctis and acts as the understanding consultant for him. He has a different accent from the others.
Ignis has been very close friends with Noctis since early childhood, to the point of being like a brother to him and acting nurturing to him, being practically Noctis's right-hand man and his undying loyalty and care for his king not only earns him Ravus's as well as the old kings respect but even impresses Ardyn himself even if only slightly and expressed in a mocking manner, even willing to sacrifice the world if he could for him, although he displays more of a resigned side after realizing it after his only opportunity has passed, accepting Noctis's desire to continue fighting Nifleheim despite knowing he will die. He not only bears Noctis no ill-will for his blindness but actually reprimands Gladiolus for blaming Noctis. He even shows a brief degree of vulnerability when Noctis thanks him for all he did, crying. At their school years, because Noctis lost his mother when he was young, Ignis has filled some of those duties for him, such as trying to make Noctis eat a healthy diet.
He is a perfectionist and tends to lose his composure when things don't go his way. Ignis is a precise person who dislikes even the slightest ambiguity. Stemming from this, he often goes in-depth in details when explaining strategies. Yet, he is the calmest and practically the brains of the party and the stabilizing influence on it. This is why he wears glasses even though his vision is passable without them. Despite his calm and serious personality, he has occasions where he jokes around, such as by making puns or sarcastic comments. He's also prone to gloat.
Although at first he wasn't particularly keen in cooking, only doing it seriously due to being part of his job, over the years he spent cooking for Noctis has made him takes great pride in his cooking skills, being offended when Prompto states he is looking forward to Iris's (or anyone else's) cooking.
Despite being mainly a support fighter, Ignis is shown to be an extremely strong fighter in battle indeed, being an extremely skilled Lancer and Knive wielder. In addition to wielding them with impeccable skill to easily defeat many foes such as Nifleheim's soldiers, he can also throw them with pin-point accuracy and can comfortably switch between a standard grip and a reverse grip. Another noteworthy combat attribute of Ignis was his natural aptitude for magic: Having been bestowed with a fraction of Noctis's powers, Ignis can manifest his weapon at will and is the foremost master of Elemancy and healing potions in the team, being the only one able to use elemental magic without magic flasks, which grants him the ability to cast cast elemental enhancements on his allies weapons as well as empower his own knives to release an area elemental attack or throw them for greater damage. He is shown to be also extremely skilled in coordinated attacks, as shown by how his Link Strikes with Noctis is the most powerful and he can even work effectively with Ravus despite the tension in their brief collaboration. Ignis is even shown to be the best fighter, apart from Noctis, out of the team, as shown in his duel with General Ravus, who had previously easily defeated Gladiolus, as he could easily fight the enraged General to defend the unconscious Noctis on equal grounds, despite his superhuman strength, even being seen to be able to push him back in a lock despite Ravus using his cybernetic arm, and eventually best Ravus, pinning his cybernetic with a knife, despite Ravus being fully willing to kill him while Ignis was only trying to reason with him. While powered by the Ring, with the significant power boost granted to him, his greatly increased magic allowing him to warp and phase, he was able to force Ardyn to flee when he wasn't using his full power and when fully powered by the ring, could even destroy his body when Ardyn used the full breath of his powers, although on both occasions Ardyn wasn't fighting to actually kill Ignis. His blindness initially greatly hampered his skill, as he can no longer see, therefore forcing him to use dark visors. By the time the eternal night begins to settle, however, in his determination to not be a burden, Ignis trains himself to be able to fight again, at first with his cane, recovering enough efficiency to be able to use it as a one-hit defeat weapon and has regained the ability to cast elemental spells accurately. Over time, as he got used to his blindness, he has regained his fighting ability, fully regaining pin-point accuracy with his marksmanship with daggers and lances and showing remarkable close-quarters skill. In addition to hunting Daemons on his own, he can still easily keep up with his allies.
An extremely intelligent and well-educated man, being a "jack of all trades" due to his study to become an example in all things, Ignis is the most knowledgeable and intelligent out of the party, being the party's main strategist and de-facto leader, apart from the undeniably more experienced and wiser Cor Leonis, who Ignis acknowledges as being better himself, being the one who gave the battle strategies used by the party and able to quickly analyze enemies to pinpoint their weakness for the party to exploit.
Ignis is the party's main driver and cooker, being constantly the one who drives the Regalia for Noctis and his other friends and effortlessly cooking exquisite meals. His cooking skills can even be applied during battle while maintaining a decent chance of succeeding to give him buffs. Like with his fighting skills, he was not able to cook anymore after he lost his eyesight but overtime it fully returned to him to the point his seafood is capable of enticing the now somber Cid and his final cook for the party made them say he should open a restaurant after this, which he seems to be confident he could do.