Gen Narumi (Sky-Piercing Bolt) is a 5-Star character in Kaiju No. 8 The Game (K8 The Game). Learn about skill upgrade priority, best build, and team comps.
Table of Contents
Basic Info & Tier for Gen Narumi (Sky-Piercing Bolt)
![]() | Rarity | 5★ |
|---|---|---|
| Type | Slash Lightning | |
| Inflicted Ailment | - | |
| Role | Defender | |
| How to Get | Gacha |
Gen Narumi [Sky-Piercing Bolt] is a Slash/Lightning Defender capable of multiple attacks. He can support allies' survivability by granting Shields and DMG Taken Reduction while drawing enemy attacks to himself and increasing his own Evasion Rate. He also possesses Additional DMG and can boost team damage through Additional DMG buffs and CRIT DMG UP for allies.
Tier & Rating
| Overall Tier | Reroll Tier |
|---|---|
![]() ▶ Character Tier List | ![]() ▶ Reroll Tier List |
User Score
Pros & Cons for Gen Narumi (Sky-Piercing Bolt)
Defender with Dual-Attributes & Multiple Attacks
Gen Narumi (Sky-Piercing Bolt) is a 5★ Slash/Lightning Defender. His Ultimate unleashes a dual-attribute AoE Attack, while his Enhanced Normal Attack during the "Prestige" state becomes a dual-attribute Blast Attack.
| Tip! | With his Additional Passive Skill, activating an Enhanced Normal Attack increases his own Ultimate Gauge by +20. |
|---|
Protects Allies with Shields & DMG Reduction
His Combat Skill allows him to grant all allies a Shield based on his Max HP and provide DMG Taken Reduction to all allies except himself, greatly improving team survivability. In addition, the "Prestige" effect increases the likelihood of being targeted by Kaiju, while "Sass" can grant him Evasion Rate +100%.
Three Effects Triggered by "Prestige"
The "Prestige" effect granted through his Combat Skill provides three benefits: CRIT DMG UP for all allies, Enhanced Normal Attacks, and a significant increase to his chance of being targeted by Kaiju.
Three Effects Triggered by "Sass"
After using an Enhanced Normal Attack or Ultimate, Gen Narumi gains 1 stack of "Sass", up to a maximum of 3 stacks. Upon reaching maximum stacks, three effects are activated: Evasion Rate +100% for himself, Additional DMG Multiplier UP for himself, and Additional DMG CRIT Rate UP for all allies. Once activated, all "Sass" stacks are consumed.
Grants Additional DMG Buffs
After activating an Enhanced Normal Attack or Ultimate, he grants himself Lightning Additional DMG based on his HP. While in the "Prestige" state, he also provides CRIT DMG UP to all allies and increases Additional DMG dealt by all allies by 40%, while "Sass" further boosts his own Additional DMG Multiplier and allies' Additional DMG CRIT Rate, significantly improving Additional DMG-focused teams.
| Tip! | Additionally, when his HP exceeds 4,000, he gains +3% CRIT Rate for every 200 HP above that threshold, up to a maximum of +36%. |
|---|
Aim for A1 and A2 First
At A1, he gains "Prestige" at the start of battle, along with ally Shields and Additional DMG CRIT DMG UP. At A2, he can revive once per battle and increase allies' DMG dealt while "Prestige" is active. These upgrades significantly improve both survivability and damage output, making A1 and A2 the best early Ascension goals. If you decide to invest further, A6 greatly improves his personal damage through increased DMG dealt and Additional DMG Multiplier boosts.
Best Team Comps for Gen Narumi (Sky-Piercing Bolt)
Additional DMG Team Composition
Kikoru Shinomiya | Soshiro Hoshina | Chester | Gen Narumi |
This team uses Kikoru (Evolving Talent) as the primary Attacker, supported by Soshiro and Chester, who both provide Additional DMG and offensive buffs. Gen serves as the Defender while further enhancing Additional DMG output. This is only one example, and other units such as Reno (The Compatible User), who also specializes in Additional DMG, can work well too.
Best Squad Setup & Recommended TeamsBest Weapons for Gen Narumi (Sky-Piercing Bolt)
Best Weapon Is GS-Aremihc

The best weapon for Gen Narumi (Sky-Piercing Bolt) is his signature weapon, GS-Aremihc. Besides increasing HP through its weapon effect, it allows all allies to recover HP after the equipped character uses their Ultimate. It also grants DMG Dealt UP and Additional DMG Dealt UP to all allies after a Normal Attack is used.
Other Recommended Weapons
GS-Walrus 92 |
Outside of signature weapons, the recommended alternative is the 4★ GS-Walrus 92. It increases HP, slightly raises the equipped character's chance of being targeted by Kaiju, and also reduces DMG Taken.
Best Unipart for Gen Narumi (Sky-Piercing Bolt)
Recommended Unipart
| Uniparts | Reasons |
|---|---|
Plant | - Shield Application Multiplier UP - Increased HP boosts Shield strength and Additional DMG output |
Recommended Stats by Part
| Arms | Body | Legs |
|---|---|---|
| HP | CRIT DMG | Lightning DMG Dealt |
Best Skill Enhance Priority for Gen Narumi (Sky-Piercing Bolt)
Recommended Skill Upgrade Priority
| Normal Attack | ★★★・・ |
|---|---|
| Combat Skill | ★★★★★ |
| Ultimate | ★★★・・ |
| Follow-Up Skill | ★・・・・ |
| Passive Skill | ★★★★・ |
Normal Attack
| Flicker Slash | ||
|---|---|---|
| - Deals Slash DMG equal to 23% of this unit's Max HP to a single Kaiju. [Enhanced Skill: Thunder-Flicker Slash (Slash & Thunder DMG, Blast Attack)] - Deals Slash and Lightning DMG equal to 15% of this unit's Max HP to a single Kaiju. - Deals Slash and Lightning DMG equal to 8% of this unit's Max HP to adjacent Kaiju. | ||
| Ult Gauge Charge | Attack Type | Attack Range |
| 60 | Slash Lightning | ST Attack |
Combat Skill
| Electric Dominion | |||
|---|---|---|---|
| - Applies Prestige (3 turn(s)) to this unit. - After this unit's turn arrives, turn duration of Prestige -1. - Applies a Shield (3 turn(s)) equal to 7.5% of this unit's Max HP to all allies. - Applies DMG Taken Reduction +19.2% (2 turn(s)) to all other allies. - Prestige: 1. All allies' CRIT DMG +16%. 2. Normal Attack changes into Enhanced Normal Attack. 3. This unit's chance of being targeted by Kaiju greatly increases. | |||
| SP Cost | Ult Gauge Charge | Attack Type | Attack Range |
| 1 | 90 | Defense | |
Ultimate
| Thunderbolt Surge | ||
|---|---|---|
| - Deals Slash and Lightning DMG equal to 41% of this unit's Max HP to all Kaiju. - After attacking, deals Lightning Additional DMG equal to 42% of this unit's Max HP to the target. | ||
| Ult Gauge Limit | Attack Type | Attack Range |
| 300 | Slash Lightning | AoE Attack |
Follow-Up Skill
| Lightning Strike | ||
|---|---|---|
| - Deals Slash and Lightning DMG equal to 34% of this unit's Max HP to a single Kaiju. | ||
| Ult Gauge Charge | Attack Type | Attack Range |
| 60 | Slash Lightning | ST Attack |
Passive Skills
Arrogance of the Strongest
| Effect |
|---|
| - After activating Enhanced Normal Attack or Ultimate: 1. Applies 1 stack(s) of Sass to this unit. Max 3 stack(s). 2. Deals Lightning Additional DMG equal to 22% of this unit's Max HP to the target. - When Sass is at its max stacks, consumes all Sass and: 1. Applies Evasion Rate +100% (1 turn(s)) and Additional DMG Multiplier +30% (2 turn(s)) to this unit. 2. Applies Additional DMG CRIT Rate +16.5% (2 turn(s)) to all allies. |
Additional Passive Skills
| Thunder Incarnate |
|---|
| Required Character Lv. Limit: Lv. 40 - After activating Enhanced Normal Attack, this unit's Ultimate Gauge +20. |
| Awkward Rally |
| Required Character Lv. Limit: Lv. 60 - While in Prestige state, all allies' DMG dealt from Additional DMG +40%. |
| Resounding Thunder |
| Required Character Lv. Limit: Lv. 80 - If this unit's HP is 4,000 or more, for every 200 HP over 4,000, this unit's CRIT Rate +3%. Max +36%. |
Ascension Priority & Effects for Gen Narumi (Sky-Piercing Bolt)
| A1 | Recommendation: ★★★★★ Unspoken Conviction - At the start of battle: 1. Applies Prestige (3 turn(s)) that is the same as Combat Skill's to this unit. 2. Applies a Shield (3 turn(s)) that is the same as Combat Skill's to all allies. - All allies' CRIT DMG from Additional DMG +40%. |
|---|---|
| A2 | Recommendation: ★★★★★ Eloquent Command - While in Prestige state, all allies' DMG dealt +24%. - If an ally other than this unit becomes incapacitated, recovers the target's HP equal to 30% of Max HP and revives them. Can be activated 1 time(s) per battle. |
| A3 | Recommendation: ★★★・・ Will to Triumph - Ultimate, Passive Skill Lv. +2. - Ultimate, Passive Skill max Lv. +2. |
| A4 | Recommendation: ★★★★・ Japan's Strongest Division - After activating Ultimate, recovers all allies' HP equal to 10% of this unit's Max HP. |
| A5 | Recommendation: ★★★・・ Invincible Readiness - Normal Attack, Combat Skill, Follow-Up Skill Lv. +2. - Normal Attack, Combat Skill, Follow-Up Skill max Lv. +2. |
| A6 | Recommendation: ★★★★★ The Strongest's Prowess - When Sass is at its max stacks, additionally applies DMG dealt +80% (3 turn(s)) and Additional DMG Multiplier +100% (3 turn(s)) to this unit. |
Gen's Ascensions improve both team support and personal damage. A1 grants "Prestige" at battle start along with ally Shields and Additional DMG CRIT DMG UP. A2 adds a one-time revive and increases allies' DMG dealt while "Prestige" is active. A4 allows him to heal allies after using his Ultimate, while A6 significantly boosts his own damage when "Sass" reaches maximum stacks.
Gen Narumi Profile
Profile

| Affiliation | First Division |
|---|---|
| Birthday | 12/28 |
| Height | 5'9 (175 cm) |
| Likes | Video games, online shopping, egosurfing, freedom, narrow spaces |
Introduction
Voice Actor
| VA | Koki Uchiyama |
|---|---|
| Notable Roles | - Hunter x Hunter (Meruem) - Jujutsu Kaisen (Toge) - My Hero Academia (Tomura) |
Gen Narumi is voiced by Koki Uchiyama.
Kaiju 8 The Game Related Guides

Character Guides
| All Characters List | Voice Actor List |
| Free 5★ Character to Pick | Best 4★ Characters |
| Completion Tracker Tool |