Every story needs someone who bursts through the shadows with laughter, boldness, and an irrepressible spark. In Heart of the Worlds, that person is Keston Pendar, an ESFP adventurer. He’s the kind of friend who makes danger feel like a game, the battle less bleak, and the long road somehow shorter. Yet beneath his banter and easy grin, Keston carries more weight than he lets on.
Where Mathias steadies and Aunia dreams, Keston leaps. His Myers-Briggs personality type, ESFP, explains a lot about the way he lives—and the way he refuses to let the world crush him.
A Sculptor’s Son in a Noble World
Keston grew up as the only child of Jared Pendar, a well-known sculptor whose commissions stretches from the capital city of Tatia to nobles across Tamore and even into the neighboring kingdom of Adar. Adar, unlike Tamore, has a more relaxed environment regarding faery kind. Keston grew up traveling there often, where he witnessed festivals like the Gar Hunt—a lighthearted chase after a furry snake-faery which allows itself to be caught on the spring equinox and it vanishes though it leaves its capture with good luck for the rest of the year. Those experiences gave him a far more cosmopolitan outlook than most of his peers… even if he never had a more formal education.
Yet for all his father’s acclaim, Keston remains technically a commoner. A truth that reared its head when he accidentally impressed Revellie, a golden pegasus mare. See, he was hurrying past the pegasi foal pens at the wrong (or maybe right time) with an apple stuck in his jacket. His bond with Revellie was instant, but some of the nobility did not see it that way. Still don’t see it that way. One, Imre Vrael, petitioned Queen Shaleia to strip Keston of Revellie on the grounds that he was “unworthy.” The attempt failed. A pegasus bonded is a pegasus bonded, but the experience left a lasting mark. It made Keston lean even further in with charm as that could help him win people over. He may not have status but he does have likeability. And now he is also a pegasus flyer, part of the Queen’s elite force.
How Keston lives his ESFP model: Life in Motion
ESFPs are often called the Performers or Explorers. They thrive on experience, connection, and the thrill of the moment. Keston definitely embodies all of these to his core. He dives into action before hesitation can settle in, trusts his senses to guide him, and never misses the pulse of what’s happening right now. He might not be great at planning for the future nor have too much desire to reminiscence about the past but the present… this is where he shines.
The Car Model (Quick Guide)
The Car Model is a simple way to picture how a Myers–Briggs personality type works. And, it helps to explain why characters act the way they do. It’s one of my favorite tools for showing why my characters make the choices they do—because their “car” is steering them differently. For example, some functions come naturally (Driver/Co-Pilot), while others only appear in moments of stress (Tertiary/Backseat).
- Driver (Se): The Experience Taker – The driver is the strongest function and tends to steer most of the choices. For Keston, his shows up as Extraverted Sensing. It means he leans into direct sensory experience and being rooted in the present. He notices the details others overlook and consequently, reacts faster than most. Whether in flight drills or skirmishes, he adapts, pivots, and thrives in the chaos.
- Co-Pilot (Fi): The Inner Compass -This balancing thought process helps to provide additional perspective to the driver process. For Keston, it means authenticity is important and for all of his mischief, he is deeply loyal. His values are his quiet compass. He may joke his way through danger, but the moment someone threatens those he loves, the grin drops and his ferocity shines.
- Tertiary (Te): The Fixer – This thought process is a quieter backseat passenger—sometimes helpful, sometimes distracting—and usually shows up when the pressure builds. During those times, Keston can rally others with quick decisions and practical solutions. It’s not always graceful, but it gets the job done.
- Backseat (Ni): The What-If Shadow – This is the weakest function, like a child in a car seat. Under stress, it can hijack the ride and will easily throw everything into chaos. For Keston, long-term planning isn’t his strength. In fact, when stressed, Keston’s mind can spin with worst-case scenarios. He hates being boxed in, and this “shadow” explains why doomed futures feel more terrifying than the dangers of the moment.
Strengths in the Story
- Fearless Action – Keston doesn’t hesitate when danger looms. Whether it’s diving into a skirmish, daring to push past a blockade, or simply being the first to laugh when fear grips a room, he moves forward instinctively. That willingness to act—even recklessly—often inspires others to follow when they’d rather freeze. His courage isn’t born of arrogance but of instinct. If something needs doing, Keston will throw himself into the moment. He’ll trust that his wits and speed will see him through. Of course, sometimes Keston’s plunging into action rubs Mathias the wrong way. He has a higher rank than Keston and it makes him look bad. Something that pings Mathias’ inner most beliefs (which are caused by his inner wounds) that he isn’t enough.
- Unshakable Loyalty – For all his teasing, Keston’s loyalty is absolute. Once someone has earned his trust, they are family. And he defends family. Yes, he is a mischievous soul but he would never abandon those he loves. Friends can lean on him in battle, in banishment, or even in the quiet moments when the weight of the world feels too heavy. Sometimes his friends will wish he’d rein in his antics, but they would never doubt where his loyalty lies.
- Light in the Dark – Hidden from most, Keston knows despair too well and he refuses to let it consume him. His laughter, quick wit, and playful jabs serve a deeper purpose than amusement—they are his sharpened weapons against fear. In the darkest hours, he reminds others that joy itself can be a rebellion. That it’s a way of saying: you haven’t beaten us yet. His humor doesn’t erase the danger or the sorrow, but it gives people the strength to keep moving. . He leans into that laughter as much for himself as for others he cares for.
Shadows of an ESFP Hero
- Reckless Impulse – Keston often leaps before he looks. His daring stunts and split-second decisions can show absolute brilliance. It can also land him and his friends in even deeper trouble and sometimes the price of his boldness is steeper than he imagined.
- Hidden Wounds Behind Humor – His smile is quick. His wit even quicker. Both often serve as armor. Rather than admit the depth of his losses, Keston covers pain with charm and laughter. To most, it looks like cheer. To those who know him best, they realize it’s a mask.
- Restless Longing for Freedom – Keston thrives being in motion, and for him, the weight of rules or obligations feels like chains. Some of this mindset comes from his childhood adventures of constantly being on the go but it goes deeper than that. He does respect his bond with Revellie and his role as a flyer but the need for freedom pulls at him. It makes him want to break out and break loose. And that restless spirit definitely clashes at times with the discipline and duty required of him.
Love, Friendship, and a Flirty Reputation
Keston is openly flirty and frequently. However, he insists on being upfront about keeping things casual and he prides himself in avoiding those who are looking for more because he does not want to take advantage. His sincerity in flattery makes him easy to like—but he secretly believes he has little to offer anyone long-term beyond being a charming diversion.
He’s good at recognizing when others need to “break loose” and when they are hurting. For example, when Mathias first arrived at Eddac Tower he was grieving the loss of his mentor. Many found him grim and untouchable. Keston didn’t. He saw past the shadows and recognized a good soul buried in sorrow. He befriended him though it took a bit for Mathias to warm up to the friendship. He probably made the most inroads by telling Mathias point blank that he, Mathias, shouldn’t allow his parents dictate his life.
As for Aunia? Keston found her attractive from the start. However, he stepped back when he realized Mathias had feelings for her. This development surprised Keston, but it also pleased him. He’s has spent time feeling angry about Mathias’ stubborn belief that he is obligated to win the heir princess’ hand in the suitor games solely because his parents expect it. Even though Mathias has defeatedly admitted that there would never be love. Something that Mathias doesn’t realize is that Keston is not above nudging things along—teasing, flirting, even making Mathias a little jealous—because he knows his two friends are better together than apart.
Writing Keston
Unlike Mathias, who resisted letting me in, Keston was an open book from the beginning. He strutted onto the page with his sly grin and bold energy, practically daring me not to notice him. And not noticing Keston? That’s a tall order. Interviewing him was like holding a conversation with a summer storm and blue skies. He’s made me laugh and sometimes shake my head. But in between the jokes, he has been revealing an inner depth I hadn’t expected.
Keston, I find, is… Well, he’s more than a sidekick. He’s the heartbeat of camaraderie, the reminder that survival isn’t just about grit—it’s also about joy, mischief, and remembering why the fight matters in the first place.
ESFP + ISFJ + INFP: The Trio Dynamic
With Aunia (INFP), Mathias (ISFJ), and Keston (ESFP), you get a balance of dreams, duty, and daring—three wildly different temperaments pulled into the same current of prophecy and survival.
- Aunia sees possibilities others miss. Her imagination and heart tilt toward what could be, not just what is. She brings vision and hope, often urging the others to take leaps they wouldn’t dare on their own.
- Mathias anchors them with steadiness. His loyalty and practicality provide the foundation that keeps their trio from unraveling. When emotions run high or choices seem impossible, Mathias steadies the ground beneath their feet.
- Keston pushes them forward with fearless momentum. He dives headfirst into danger, cracks a joke in the worst of times, and shakes them loose when fear or grief threatens to hold them back.
They clash often. Keston’s impulsiveness drives Mathias to frustration, while Aunia sometimes feels his teasing cuts too close. And yet, it may be these clashes which forge their combined strength. Aunia reminds Keston that laughter doesn’t have to hide every scar. Mathias steadies him when his recklessness tips toward disaster. And Keston, in turn, reminds them both to live—to find joy, mischief, and boldness even in a world weighed down by duty and shadows.
Together, they form a triad that is stronger than any one of them alone: the dreamer, the protector, and the spark.
The Heart of Keston
At his core, Keston represents joy as defiance. Little wonder that he is one of my favorite characters. In a world heavy with prophecy, exile, and betrayal, his insistence to live fully is an act of rebellion. His laughter doesn’t mean he hasn’t been scarred. Or scared. It means he refuses to let those win.
And maybe that’s why he matters so much—because when the darkness presses close, sometimes what you need isn’t just a protector or a dreamer. Sometimes, you need the spark.
✨ Want to meet Keston? His journey intertwines with Aunia and Mathias in the Heart of the Worlds series.