KOS-37

Lore & Background

The Kerbal Space Center maintains a small but proud roster of astronauts, each identified by a KOS number and a name that reflects the community's affectionate, slightly bureaucratic naming conventions. KOS-37, Jeanne van Louvier, occupies a place in that roster that players quickly grow to know well. She is not the first Kerbal to reach orbit in any given career save, nor is she guaranteed to be the last; she is simply there, in the crew quarters, waiting for a mission brief that matches her skills and the player's ambition.

What makes KOS-37 resonate with the community is the freedom the game grants her. In a world where the only fixed canon is that Kerbals are small, round, and slightly worried, Jeanne can be anything the player imagines: a cautious engineer who double-checks every delta-v calculation, a daring explorer who pushes a lander to the edge of the Mun's far side, or a quiet observer who spends a long transfer orbit sketching the rings of Kerbin from a porthole. The game's sandbox nature means her story is, in a very real sense, the player's story.

Among Kerbal fans, the crew roster has a warm, almost familial feel. Each Kerbal has a little personality suggested by their name and number, and KOS-37's slightly formal, slightly old-fashioned name gives her an air of quiet reliability. She is the Kerbal you trust with the one-shot interplanetary window, the one whose survival you check first when the landing report finally chimes in.

Reader's Guide

Full Name: Jeanne van Louvier. Designation: KOS-37. Role: Kerbal Astronaut, Kerbal Space Center.

Career Arc: In the open-ended structure of Kerbal Space Program, KOS-37 has no developer-scripted career. Her arc is written by the player. In one save she might be the first Kerbal to achieve a stable Mun orbit; in another, she might sit in a crew bay for forty in-game days while the player perfects a Duna transfer trajectory. She is, by design, a blank slate with a name and a number.

Notable Missions: None are fixed in canon. The game's sandbox means every mission is player-authored. Community-shared screenshots and videos, however, have made her a familiar face in countless "first landing on Moho" and "Kerbin-to-Eeloo" clips.

Cause of Death: No fixed canon death exists. In any given playthrough, KOS-37 may survive every mission or perish spectacularly in a reentry fireball at 2,000 m altitude. Both are equally valid.

Fan Memes & Inside Jokes: The KSP community tends to treat the entire Kerbal roster as a small, endearing family. KOS-37's slightly formal, old-world name earns her the affectionate nickname "the Reliable One" in fan art and forum posts. She is also a frequent subject of "what if" fan fiction, where players imagine her as the quiet, unflappable veteran who has seen every catastrophic launch and simply sighs. The broader KSP meme culture—exploding rockets, Kerbals waving goodbye from a dying capsule, the eternal struggle against gravity—applies to her as it does to every crew member: she is, ultimately, everyone's Kerbal.

Did You Know?

• In Kerbal Space Program, every Kerbal astronaut is available to the player from the start of a new career save, meaning KOS-37 can be assigned to her very first mission as a suborbital hop or a full interplanetary flyby.
• The KOS numbering system in KSP is a nod to the real-world tradition of assigning astronauts sequential or thematic crew numbers, giving each small, round Kerbal a sense of institutional identity.
• Because KSP is a sandbox, the same KOS-37 can be the hero of one player's career and a tragic casualty of another's, making her story as varied as the player base itself.
• Kerbal Space Program's Kerbal crew members are intentionally minimal in fixed backstory, a design choice that invites players to project their own narratives onto each small, waving face.