The informant who already knows where you are
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From the discovery of Radianite to the conflict between the two Earths, the complete timeline of the VALORANT Protocol.
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Klara Böhringer, alias Killjoy, is a German inventor of precocious talent. She has no Radianite power and makes no secret of it: everything she brings onto the field, she designed, assembled and debugged herself.
That absence of a supernatural gift is exactly what defines her. Where other agents have to live with a power they never fully master, Killjoy knows precisely what each of her gadgets does, down to the millisecond. Her confidence borders on arrogance, but it is almost always justified.
On a site, she does not fight: she installs a system. A turret watching the blind angle, a bot guarding the flank, swarms making a zone impassable. When the opponent arrives, they are not up against Klara, they are up against the infrastructure she left behind. She is the sentinel who holds a site on her own, as long as you accept that she is not the one pulling the trigger.
Killjoy throws a covert grenade that she can activate remotely to release a damaging swarm of nanobots.
Killjoy deploys a covert bot that hunts down enemies in range and explodes on contact, leaving them vulnerable.
Killjoy installs an automatic turret that fires at any enemy inside a wide frontal cone.
Killjoy deploys a device that, after a long windup, detains every enemy caught in its area of effect.
Its damage is deliberately low: it is not there to kill. Its real value is the sound it triggers and the obligation it puts on the opponent to destroy it, which reveals their position and their timing. Place it on the angle you are not watching, never on the one you already hold.
Throwing your swarms at the first sound you hear is wasting them. Keep them for the moment the Spike is planted: placed discreetly around the site and activated the instant the defuse starts, they cancel the attempt or kill the player. Two charges, two aborted defuses.
Many players leave the Alarmbot unused on attack. That is a mistake: placed behind your team during the execute, it detects and makes vulnerable any defender trying to take you from behind. You secure the rotation without pinning a player in place.
The ultimate takes a long time to arm and is easily destroyed. Do not drop it in the middle of the site while exposing yourself: place it behind cover, where the opponent will have to step out to break it. And keep it for the retake, not to delay an entry.
Killjoy is one of the most played sentinels in Valorant, at every level of play. What sets her apart is a fully automated kit: turret, detection bot and swarms work without her needing to watch over them constantly. In practice, she can hold a site alone while a teammate plays elsewhere, which frees up an enormous human resource on the map. It is also what makes her an excellent choice for a player whose precision is not yet their strong point: Killjoy makes her impact through the placement of her utility, not through her ability to win duels.
That is precisely her appeal. Unlike a duelist such as Jett or Reyna, whose entire value depends on eliminations, Killjoy draws her impact from the placement of her gadgets. A well positioned turret signals an entry, an Alarmbot makes an enemy vulnerable, Nanoswarms cancel a defuse, all of it without her having to win a single duel. A player with good game sense but average precision will have far more impact with her than with a fragging agent.
The basic rule: never on the angle you are already holding. The turret exists to cover what you are not watching. Place it so it watches the secondary entrance or the flank while you hold the main line. A placement slightly elevated or set back makes it harder to destroy quickly. And remember to pick it up before a rotation: it is reusable.
Cypher is oriented toward pure information: his cameras and wires reveal enemy positions without necessarily dealing damage. Killjoy is oriented toward active control: her turret shoots, her Nanoswarms hurt, her Alarmbot applies vulnerability, and her ultimate detains. Cypher excels when the team knows how to exploit information; Killjoy is more autonomous and better suited to a player who has to hold a site alone. The two combine very well on large maps.
Klara Böhringer is a German inventor recruited young by the VALORANT Protocol. She has no Radianite power at all: every piece of her equipment is of her own design. That status as a pure engineer among agents with supernatural abilities is central to how she is written, as is her assertive confidence, which makes her as effective as she is irritating to some of her teammates.