Who counters Valkyrie in Rainbow Six Siege?

IQ, Brava, Dokkaebi, Nøkk and Twitch. IQ: finds cams through walls. Beats Valkyrie on entry. Brava: hacks the cams for the attack. Dokkaebi: hacked phones give the attack the cam feeds.

Who pairs well with Valkyrie?

Maestro: Cams everywhere. Echo: Cams and Yokai. Pulse: Hear it, see it.

Valkyrie: counters, combos and tips

Q: What is Valkyrie's gadget?

Black Eye (Gyro Cam Mk2). Three throwable sticky cameras added to the team's camera pool (wide field of view, colour feed); they keep working for teammates after Valkyrie dies and drop out after 10 s outside.

Defender · Ghosteyes · intel, support, retake intel

Valkyrie is countered by IQ (finds cams through walls), Brava (hacks the cams for the attack) and Dokkaebi (hacked phones give the attack the cam feeds). Valkyrie pairs best with Maestro, Echo and Pulse.

Valkyrie's gadget: Black Eye (Gyro Cam Mk2)

Three throwable sticky cameras added to the team's camera pool (wide field of view, colour feed); they keep working for teammates after Valkyrie dies and drop out after 10 s outside.

Who counters Valkyrie?

IQStrongfinds cams through walls. Beats Valkyrie on entry.
BravaSituationalhacks the cams for the attack.
DokkaebiSituationalhacked phones give the attack the cam feeds.
NøkkSituationalinvisible on cams.
TwitchSituationaldarts destroy cams.

What does Valkyrie counter?

Valkyrie isn't a direct counter to any one operator; the value is in the role.

Best Valkyrie combos

MaestroCams everywhere.
EchoCams and Yokai.
PulseHear it, see it.

Where Valkyrie is strong

Pillar cams see Red Stairs and the top floor. Sites: Kafe Dostoyevsky Cocktail Lounge / Bar.
Strong pick on Oregon. Sites: Oregon Kids' Dorms / Dorms Main Hall, Oregon Dining Hall / Kitchen, Oregon Kitchen / Meeting Hall, Oregon Laundry Room / Supply Room.
Camera in the Tower watches the main breach. Sites: Oregon Kitchen / Meeting Hall.

Valkyrie myths

Valkyrie counters Sledge / Buck vertical. Her cams only show the vertical player; nothing in the kit stops a hammer or Skeleton Key. Removing valkyrie>sledge was right; keep valkyrie>buck out too.
Valk cams should work after she dies. TRUE: Black Eyes are team cameras.

Key Valkyrie facts (Y11S3)

Three Black Eyes, thrown like a light grenade, retrievable; once stuck they join the defenders' camera pool, viewable by the whole team; they lose signal 10 s after being placed outside. (since Y7S1 (patch 7.1.0) for the outside rule; current)
Because they are team cameras, they stay usable by living teammates after Valkyrie dies.
Electronic: IQ detects them, Thatcher's EMP disables them, Twitch's dart destroys one in a zap, Zero's lasers and Flores's RCE destroy them, Brava's Kludge hacks them for the attack, Dokkaebi turns them against the defense with a dead defender's phone, and Nokk's HEL hides her from them.
Black Eyes give no way to stop Sledge's hammer or Buck's shotgun; they only show where the vertical player is.

Sources

More defenders

Alibi Aruni Azami Bandit Castle Caveira Clash Denari Doc Echo Ela Fenrir Frost Goyo Jäger Kaid Kapkan Lesion Maestro Melusi Mira Mozzie Mute Noor Oryx Pulse Rook Sentry Skopós Smoke Solis Tachanka Thorn Thunderbird Tubarão Vigil Wamai Warden