- Gameplay Notes -

Cocolia is the second to last Boss enemy in the Jarilo-VI Story. She will appear as a "Fragmentum Echo" in the overworld, covered in glitch as if she was Entangled. This effect disappears upon initiating the battle.
At this point of the game, a player should have completed their Departure Warp and have many free characters obtained. Assuming the player have not gained a Standard 5-star Character at this point, the best free to play team option would be:
This team focuses on the Duo-DPS Toughness shred. If your Natasha is not able to support by herself, replace either Qingque or Serval with March 7th for better survivability.
Notice: There is an Achievement if Serval deals the last hit against Cocolia. Use this information wisely.
For new players who have already gained a Standard 5-star Character from Departure Warp, here are some replacement options.
Himeko can replace Qingque, since Himeko is easier to use, and Qingque can take a lot of Skill Points. Bailu/Gepard can replace Natasha, with Bailu having the ability to shred Lightning Weakness. Bronya can replace Qingque in order to support Serval.
Notice: if you already have gained Tingyun, you can also use her against Cocolia. Not only does she deal Lightning Toughness shred, she also gives a great amount of buffs and Energy Regeneration, which is perfect for any DPS units that is not Acheron (doesn't have Energy).
Cocolia has high Ice DMG Resist, so it's not recommended to use an Ice type DPS against Cocolia.
Cocolia has high Crowd Control Resist, so Entanglement and Imprisonment has a lower chance of appearing if Cocolia is Weakness Broken by Quantum/Imaginary Toughness shred.
Cocolia is highly resistant to Freeze.

- Post-Story Content -

In Memory of Chaos, players can make their teams against Cocolia according to the MoC Memory Turbulence, which provides a certain type of condition that might benefit some DPS units over the others.
Players should be aware of Cocolia's high Freeze rates. Here are characters that can mitigate the Freeze impact.
DPS units with according Types to Cocolia's Weaknesses usually performs better than those who don't. Here are some great Limited 5-star DPS units recommended against Cocolia:
For supporting units, players should choose according to their general team build. Here are some recommended supporting characters for general Post-Story Content:

- Simulated Universe -

Cocolia becomes Cocolia (Complete) in Simulated Universe World 6. This variation of Cocolia has 3 Phases, in contrast to the single-phase normal variation. In Phase 2, Cocolia (Complete) will immediately summon Bronya (Complete), a faster variation of the Bronya Boss unit. With Bronya's Action Advance Forward, Cocolia can charge Punishment of Endless Winter with ease, which is extremely dangerous to players who are not as experienced. The recommendation is to defeat Bronya before Phase 3, in which she is much more of a threat. However, do notice that there's an achievement for defeating Cocolia without defeating Bronya.
Cocolia (Complete) gains an exclusive hidden skill upon entering Phase 3: Doomsday Ice Cascade. When Phase 3 starts, Doomsday Ice Cascade will immediately appear on the action bar, and will deal Ice DMG to all targets, with a 100% Base Chance to Freeze a random target who is not Frozen. This is extremely problematic, since the player will lose a great amount of Action and HP if not careful.
The best path for beginners to follow against Cocolia (Complete) would be the path of Abundance, since Path Resonance Formation: Anicca removes Crowd Control debuff from allies and Path Resonance Formation: Anatta provides great passive healing.
Due to the Conundrum Game Mode in Simulated Universe: Gold and Gears (Unlocked after completing Difficulty V), Cocolia (Complete) will gain a new buff when Auxiliary Conundrum is set to +2. When her HP is below 50% in Phase 3, an extra Doomsday Ice Cascade will immediately appear in the action bar, allowing more opportunities to free and deal high DMG.

- Achievements -

When the National Anthem Rings	Have ally Bronya use "The Belobog March" 1 time(s) when fighting the bosses Gepard, Cocolia, and Bronya respectively
Serval's Parting Gift	Use Serval to deal the final blow in a victory against boss Cocolia
Et tu, Bronya?	Use Bronya to deal the final blow in a victory against boss Cocolia
Road to Canossa	Interrupt Cocolia's use of "Wrath of Winterland Saints" when she is charging
Save the Princess	Defeat Cocolia without defeating Bronya

- Trivia -

Cocolia is an Alternate Universe version of Cocolia from Honkai Impact 3rd. In HI3, she is the housemother of her orphanage and a member of the radical branch of Anti-Entropy.
Bronya is adopted by Cocolia. When Bronya disappeared into the Underworld, Cocolia let down her defense and gave in to the Stellaron of Jarilo-VI.
Cocolia used to be friends with Serval.
Cocolia's full name is Cocolia Rand.
Cocolia evolves into Cocolia, Mother of Deception at the end of the Jarilo-VI Story.

- Related Entries -

For Cocolia, Mother of Deception:
Other entries: