Who counters Flores in Rainbow Six Siege?

Mute, Mozzie and Aruni. Mute: jammer stops the drone. Shuts down Flores. Mozzie: Pest destroys a moving RCE. Aruni: Surya laser destroys the drone before it armors.

Flores: counters, combos and tips

Q: What does Flores counter?

Bandit, Jäger, Kaid, Maestro and Melusi. Bandit: destroys the battery and prevents Bandit tricking. Jäger: kills ADS, can't be caught. Kaid: destroys Electroclaws.

Q: What is Flores's gadget?

RCE-Ratero Charge. 4 explosive drones (10 s fuse, can't reverse) that armor up and blow a 3 m blast destroying nearly every defender gadget (Bandit, Kaid, Mute, ADS, Mag-NET, Evil Eye, Banshee, Kapkan, Ela, Lesion, Frost, Castle panels, Kiba...) and soft surfaces/unreinforced hatches.

Attacker · Ghosteyes · wall-denial clearer, anti-gadget, trap clear

Flores is countered by Mute (jammer stops the drone), Mozzie (pest destroys a moving RCE) and Aruni (surya laser destroys the drone before it armors). Flores counters Bandit, Jäger (kills ADS, can't be caught) and Kaid (destroys Electroclaws). Flores pairs best with Hibana.

Flores's gadget: RCE-Ratero Charge

4 explosive drones (10 s fuse, can't reverse) that armor up and blow a 3 m blast destroying nearly every defender gadget (Bandit, Kaid, Mute, ADS, Mag-NET, Evil Eye, Banshee, Kapkan, Ela, Lesion, Frost, Castle panels, Kiba...) and soft surfaces/unreinforced hatches.

Who counters Flores?

MuteHard counterjammer stops the drone. Shuts down Flores.
MozzieStrongPest destroys a moving RCE.
AruniSituationalSurya laser destroys the drone before it armors.

What does Flores counter?

BanditStrongdestroys the battery and prevents Bandit tricking.
JägerStrongkills ADS, can't be caught.
KaidStrongdestroys Electroclaws.
MaestroStrongdestroys Evil Eyes from out of sight.
MelusiStrongdestroys Banshees. Clears Melusi's traps.
WamaiStrongkills Mag-NETs, can't be caught.

Best Flores combos

HibanaDrone clear, then pop.

Flores myths

Flores breaks Mira's Black Mirror. The Flores wiki page states the RCE does not affect the Black Mirror; no source found that it does. Remove flores from the sim's Mira-breaker list (the player claim is probably right).
Vigil counters Flores. ERC-7 only hides Vigil from the drone feed; Flores's job is gadget destruction, which Vigil doesn't stop. At most strength 1.

Key Flores facts (Y11S3)

Blast (3 m) destroys Bandit Shock Wires, Kaid Electroclaws, Mute Disruptors, Jäger ADS, Wamai Mag-NETs, Maestro Evil Eyes, Melusi Banshees, Kapkan EDDs, Frost mats, Ela/Lesion mines, Castle panels, Goyo shields, Alibi Prismas, Valkyrie cams, Yokai, Pests; also opens unreinforced hatches. (since Y6S1 (Crimson Heist))
ADS and Mag-NET cannot intercept the drone. (since Y6S1)
Mute's jammer stops it working inside the radius; Mozzie's Pest destroys it; touching electrified objects, Evil Eye lasers or Surya Gates destroys it before it armors. (since Y6S1)
Fandom wiki: 'The RCE-RATERO will not affect Mira's Black Mirror.' (Explosives can destroy a mirror's gas canister on the defender side, which ejects the glass rather than removing the mirror.). (since Y6S1)
Vigil's ERC-7 makes him invisible to the RCE-Ratero feed. (since Y6S1)
Y11S1.1: exit delay after triggering the explosion reduced from 2 s to 1 s. (since Y11S1.1)
Explosives destroy Azami's Kiba Barriers; the Azami page names Flores's drone. (since Y7S1)

Sources

More attackers

Ace Amaru Ash Blackbeard Blitz Brava Buck Capitão Deimos Dokkaebi Finka Fuze Glaz Gridlock Grim Hibana Iana IQ Jackal Kali Lion Maverick Montagne Nøkk Nomad Osa Ram Rauora Sens Sledge Solid Snake Striker Thatcher Thermite Twitch Ying Zero Zofia