Tower of Fantasy Cobalt B build


When you first meet Tower of Fantasy’s Cobalt B on your initial visit to Hykros, she comes across as quite the aloof and quiet gal. But, when equipped with her powerful weapon, Flaming Revolver, she proves herself to be a real fiery bright spark, and a threat to anyone in range. Team that with her fierce intellect and skills as a mechanic, and it’s clear that she’s a great asset to any team.

If you want to make the most of Tower of Fantasy Cobalt B’s talents, you’re in the right place. In this ToF Cobalt B build guide, we look at her skills, attacks, advancement, and more. Keep in mind that, as she’s yet to join Tower of Fantasy global, most of the information in this guide is based on the CN version of the game, and will likely change with her global release.

While you’re here, be sure to check out our Tower of Fantasy character guide and Tower of Fantasy tier list to see how all the Simulacra size up. We’ve also got a bunch of builds for other characters, including Tower of Fantasy Claudia, Tower of Fantasy Frigg, and Tower of Fantasy Cocoritter.

Tower of Fantasy Cobalt

Who is Tower of Fantasy’s Cobalt B?

As Cobalt B is still currently a CN version exclusive, we don’t have much information on her yet. We do, however, know that she’s a super smart gal who works for Hykros, and is the one who sets you up with your first pair of wheels, Falcon. In our brief interaction with her during the main story quest, we saw that she’s a bit of a quiet one, seemingly more interested in the tech she works on than any social interactions.

Cobalt B is an SSR Simulacra who wields a fire-imbued gun called Flaming Revolver.

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What is Tower of Fantasy Cobalt B’s banner?

Cobalt B made her initial debut in the CN version of Tower of Fantasy back in January 2022 and was actually the second limited Simulacra in the game. She’s yet to come to the global version, and Hotta hasn’t confirmed her release date, but we suspect she’ll join the roster soon. We’ll update this guide as soon as we know more.

What’s the best Tower of Fantasy Cobalt B build?

As we’ve not had the chance to test her out yet, we can’t confirm the best Tower of Fantasy Cobalt B build. However, from what we’ve seen, she’s a strong, ranged DPS with great fire damage application, and AoE and crowd control potential. According to CN players, she falls into the S tier of the Tower of Fantasy tier list, implying that she’s a very valuable unit in their meta, but whether this carries over to the global version remains to be seen.

What are Tower of Fantasy Cobalt B’s weapon stats?

Here, we list all the main stats for Cobalt B’s weapon, Flaming Revolver, according to the CN version of the game. These are the weapon’s base stats before you level it up or equip it with any matrices.

The shatter ranking dictates how quickly Flaming Revolver can break enemy shields, whereas the charge rate shows how quickly the weapon gains charge.

  • CS: 272
  • Shatter: 6.50 (B)
  • Charge: 10.00 (A)
  • Attack: 19
  • HP: 1165
  • Crit: 13
  • Type: Flame – when your weapon is fully charged, your next attack sets the target on fire for eight seconds, causing ongoing damage equal to a set percentage of attack every second. Ignited targets receive reduced efficacy from healing

Tower of Fantasy Cobalt B crouching in an action pose

What are Tower of Fantasy Cobalt B’s attacks and skills?

Here are each of Tower of Fantasy Cobalt B’s skills and attacks according to the CN version of the game. Note that this is based on Guren Blade’s level one stats, which increase as you level up the weapon.

Normal attacks

Normal attackWhile on the ground, perform five basic attacks in a row.
First attack: deal damage equal to 54.9% of ATK +3
Second attack: deal damage equal to 79.2% of ATK +4
Third attack: deal damage equal to 99.2% of ATK +5
Fourth attack: deal damage equal to 149.7% of ATK +8
Fifth attack: deal damage equal to 144.7% of ATK +7
Charge attack (hold attack)Tap and hold basic attack to enter the charging attack state. As charging time increases, your damage increases, up to 100.2% of ATK +5 damage. Trigger an explosion three seconds later (or when the target dies), dealing 25% of ATK +1 ranged damage to nearby enemy units, during which every time the target takes damage, the ranged damage is doubled (up to four times) and the damage is increased
Jump attack (jump, attack)When in the air or after a jump, launch an air attack, throwing a bomb forward which deals damage to enemies in a circular AoE. The bombs deal 95.3% of ATK +5 damage, and knock the target back, consuming 250 stamina
Aerial attack (jump, jump, attack)Fires a ray of primal energy downwards and strafes forward, dealing damage to enemies equal to 35.5% of ATK +2

Dodge attacks

Melee breakUse a basic attack immediately after dodging to trigger a melee break attack. Inflicts damage to targets in the skill range with 163.9% of ATK +8 damage


BarrageContinuously fire at targets within the skill range, causing a total of 700% of ATK +35 damage60 seconds

Discharge skill

Multiple grenadeWhen a weapon is fully charged or phantasia is triggered, switch to this weapon to cleanse yourself of all debuffs and launch three grenades. Hitting a target deals 598.5% of ATK +30 damage, with a knock-up effect

Tower of Fantasy Cobalt B advancement

You can advance Tower of Fantasy weapons by using their corresponding fusion cores, which you get by collecting more than one copy of a character. After you get your first copy of Cobalt B and her Flaming Revolver, you can purchase another copy through the limited store during her banner for 120 flame gold. Alternatively, you can get a duplicate of Cobalt B by pulling on the banner, but, of course, this is entirely up to RNG.

Advancing your weapons by spending fusion cores and gold unlocks special bonuses. Here are all of the bonuses you gain from unlocking each of Cobalt B’s advancement stars.

  • One star: each round of attack deals additional damage equal to 2% of the target’s current HP (cannot exceed 200% of attack)
  • Two stars: increases the weapon’s base attack growth by 16%
  • Three stars: dodge and charged attacks inflict Ion Scorch on targets that are already burned, dealing flame damage equal to 60% of their current attack every second for ten seconds
  • Four stars: increases the weapon’s base attack growth by 32%
  • Five stars: increases Ion Scorch’s damage to 90% of attack. Successful attacks with any weapon’s dodge skills refresh the duration of Ion Scorch
  • Six stars: your barrage skill inflicts burn for 15 seconds. Successful attacks with any dodge skills reduce the barrage’s cooldown by four seconds. This effect has a 1.5-second cooldown

Tower of Fantasy Cobalt B debut splash art showing her name and her holding a gun

What’s the best Tower of Fantasy Cobalt B matrix set?

Cobalt B has her own SSR matrices, which are likely to be featured on the limited matrix banner alongside her limited weapon banner. According to the CN version, her set complements her mobile combat style, allowing her to dodge more frequently and increasing her DoT application and damage capabilities. Alternatively, combining two of Samir’s set and two of Crow’s set is a great choice, boosting both her crit and damage per hit.

For an SR substitute, you can go with Sobek’s Swamp Shadow set, which boosts her damage based on how many enemies are in range. Or, if you need an R-rank option while you wait for something better to come along, go with Self-explosive, which gives you a small flame damage boost.

Check out our Tower of Fantasy matrices guide to find out more.

ToF matrix setRarityEffect
Cobalt B (CN version, subject to change)SSRTwo equipped: restore one dodge every four dodges. Dodge attacks add burn to the target, dealing 13%/17%/21%/25% attack damage per second for ten seconds
Four equipped: increases damage to targets with abnormal statuses by 13%/17%/21%/25% 
SamirSSRTwo equipped: increases your damage progressively by 1% upon hitting a target. Stack up to 10/13/16/20 times. Lasts 1.5 seconds
Four equipped: increase Dual EM Stars’ electrical explosion damage by 16%/22%/30%/40% of attack
CrowSSRTwo equipped: increases crit damage to targets with less than 60% HP by 24%/30%/36%/42%
Four equipped: crits deal additional damage over time equal to 18%/22%/26%/30% of attack every second for five seconds. Does not stack
SobekSRThree equipped: increases damage dealt by 6%/7.5%/9% for each enemy nearby. Up to three stacks
Self-explosiveRThree equipped: increases damage dealt by flame weapons by 6%

What are Tower of Fantasy Cobalt B’s upgrade materials?

To upgrade Cobalt B, you need firecore, nano coating, and booster frames. You can get boxes containing nano coating and booster frames as rewards from Dimensional Trials, Interstellar Exploration, Omnium Beacons, and the weapon store. You can find firecore while out exploring, or by using elemental shard boxes. For more help locating materials, check out our Tower of Fantasy map guide.

A close up of Tower of Fantasy Cobalt B adjusting her glasses

What are the best Tower of Fantasy Cobalt B team comps?

We’ve not had the chance to test out different Cobalt B team comps yet and, as her skills and stats are likely to be altered in her global release, it’s tough to speculate. We’ll be sure to update this guide as soon as we work out the best weapons to pair with her Flaming Revolver.

What are the best Tower of Fantasy Cobalt B gifts?

When looking for gifts for Cobalt B, remember that her favourite tags are metal items, collectibles, and limited edition items. We’ve listed all her favourite gifts below, along with their rarity, the number of awakening points they give, and where to get them from. Head over to our Tower of Fantasy gifts guide to find out more.

GiftRarityAwakening points givenHow to obtain
Silver cookwarePurple80Special gift box
Crown tokenPurple80Special gift box
Warren fossilPurple60Special gift box
Aida comicPurple60Special gift box
Smarty dollPurple60Special gift box
Limited Peanut figurinePurple60Special gift box
Metal Alf figurinePurple60Special gift box
Limited Tata figurinePurple60Special gift box
Banges specialtyPurple60Special gift box
New game consolePurple60Special gift box
Music boxPurple60Special gift box
Gem necklaceBlue30Fine gift box
Tool setBlue30Fine gift box
Dumbbells Green15Small gift box or from the item vendor in Banges
Snack boxGreen15Small gift box or from the item vendor in Banges

Tower of Fantasy Cobalt B interacting with a hologram screen

What are Tower of Fantasy Cobalt B’s awakening rewards?

Giving Cobalt B gifts earns you awakening points. When you hit certain awakening progress milestones, you also unlock recollection rewards. Here are all of Tower of Fantasy Cobalt B’s awakening rewards.

Keep in mind that you can use a Simulacra’s unlocked trait without taking on their appearance by toggling the ‘use Simulacra trait’ switch underneath them on the Simulacra selection page.

Awakening pointsRecollection reward
200Cobalt B avatar
600Log entry
1,200Cobalt B trait – when Cobalt-B releases a discharge skill, restore 50 – 120 points of energy charge at random
2,000Log entry
3,000 Log entry
4,000 Cobalt B trait – when Cobalt-B releases a discharge skill, restore 90 – 180 points of energy charge at random

That’s everything we’ve got on Tower of Fantasy’s Cobalt B at the moment. If you want to explore a whole new world outside of Aesperia, be our guest and check out our Disney Dreamlight Valley realms guide.

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