Levelling up characters is essential if you want to take on harder challenges in Zenless Zone Zero (ZZZ). Check out how to level up your agents and what materials you'll need to do so.

How to Level Up Characters

Use Agent Exp. Materials

If you want to level up your Agents, you'll need to use Investigator Logs. Each tier will give a different amount of experience, specifically 100, 600, and 3000 Exp. respectively.

Thankfully, you'll come across a lot of Investigator Logs just from playing the game.

Defeating Enemies Doesn't Give Experience

Unlike other games, defeating enemies doesn't give Experience Points. The only way to level up a character is by using Investigator Logs.

List of Investigator Logs

List of Items
Trainee Investigator Log	Official Investigator Log	Senior Investigator Log

Promote to Increase the Level Cap

Once you reach certain level thresholds, you'll be capped out and can't level up anymore. To remove the cap, you'll need to promote the character by spending Certification Seals.

You can get these seals by participating in Combat Simulations in the HIA Club. However, the seal needs to be the same Speciality as the Agent that you will promote.

How to Ascend (Promote) Characters

List of Certification Seals

List of Items
Basic Stun Certification Seal	Basic Support Certification Seal	Basic Offense Certification Seal
Basic Anomaly Certification Seal	Basic Defense Certification Seal	Advanced Stun Certification Seal
Advanced Support Certification Seal	Advanced Offense Certification Seal	Advanced Anomaly Certification Seal
Advanced Defense Certification Seal	Pioneer's Certification Seal	Buster Certification Seal
Controller Certification Seal	Ruler Certification Seal	Defender Certification Seal

Increased Level Unlocks Skill Enhancement

Whenever you level up a character, it will also unlock new Skill Enhancement levels. Similar to the level cap, you'll need to reach certain level thresholds before you can continue upgrading a Skill.

Besides that, you'll also need Attribute Chips of the character's Attribute to level up a Skill. Like Certification Seals, you can get them from Combat Simulations in the HIA Club.

List of Attribute Chips

List of Items
Basic Physical Chip	Basic Burn Chip	Basic Freeze Chip
Basic Shock Chip	Basic Ether Chip	Advanced Physical Chip
Advanced Burn Chip	Advanced Freeze Chip	Advanced Shock Chip
Advanced Ether Chip	Specialized Ether Chip	Specialized Shock Chip
Specialized Freeze Chip	Specialized Burn Chip	Specialized Physical Chip
Original Chip

Don't Forget to Enhance Core Skills

Similar to regular skills, you'll also unlock new Core Skill levels whenever you reach certain level thresholds. Don't forget to upgrade these alongside your regular skills since these are powerful passives that will always be available.

As for the level up materials, you'll need unique Core Skill enhancement materials to upgrade them. Always keep them on hand so that you aren't left with un-upgraded Core Skill.

List of Core Skill Materials

List of Items
Higher Dimensional Data - Destructive Advance	Higher Dimensional Data - Steel Malice	Higher Dimensional Data - Murderous Obituary
Higher Dimensional Data - Ethereal Pursuit	Living Drive	Ferocious Grip
Finale Dance Shoes

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