With the release of Version 2.4, Zenless Zone Zero introduced a limited-time Signal Search cycle that drew attention to two S-Rank Agents and two S-Rank W-Engines. The event window began after the Version 2.4 update and continued until December 17, 2025 at 11:59 server time. By 2026, these banners have cycled out, but the information remains valuable for players who want to understand why Dialyn and Hugo were considered high-priority assets during their debut.

The Featured Agents

The Agent Signal Search Event placed Dialyn and Hugo in separate Exclusive Channels, while also boosting the reception rates of Corin and Billy. Dialyn was the only limited S-Rank Physical-Stun unit in the lineup, which made her particularly interesting for teams that needed reliable interruption and burst windows. Hugo, on the other hand, operated as a limited S-Rank Ice-Attack Agent, filling a role centered on offensive pressure and elemental damage.

What made this setup especially notable? It was not simply a double banner with identical support units. Corin and Billy both appeared as A-Rank Physical-Attack options beneath both S-Rank Agents, giving players a chance to pick up useful Attack agents while aiming for either exclusive target. This consistency across the two Exclusive Channels lowered the risk for players who wanted to build around Physical team synergies.

The W-Engine Signal Search

The accompanying W-Engine banners added two limited S-Rank picks. The first, Yesterday Calls, was a Stun W-Engine clearly designed to match Dialyn's role. The second, Myriad Eclipse, was an Attack W-Engine suited for Hugo's damage profile. The A-Rank W-Engines Housekeeper and Starlight Engine Replica were also boosted, both of which belong to the Attack category.

A quick look at the channel structure shows how the event was divided:

Channel Type	Exclusive Channel	Featured S-Rank	Featured A-Ranks
Exclusive Agent Channel	Voice of the Once-Spoken	Dialyn (Physical - Stun)	Corin and Billy
Exclusive Agent Channel	As Yesterday Dies	Hugo (Ice - Attack)	Corin and Billy
W-Engine Channel	Dissonant Sonata	Yesterday Calls (Stun)	Housekeeper and Starlight Engine Replica
W-Engine Channel	Vibrant Resonance	Myriad Eclipse (Attack)	Housekeeper and Starlight Engine Replica

This structure kept Agent and W-Engine pity calculations easy to understand. Search counts for guaranteed Signals were cumulative across all Exclusive Channels, so a player could move between the Dialyn and Hugo banners without losing pity progress. Similarly, W-Engine pity was cumulative across all W-Engine Channels. However, Agent pity and W-Engine pity were independent of each other and unaffected by other channel types. That meant a player near pity on an Exclusive Channel could not transfer that guarantee to a W-Engine banner.

There was also a clear exclusion rule: the limited S-Rank Agents and limited S-Rank W-Engines from this event did not become available in the Star-Studded Cast Stable Channel. That placed extra emphasis on pulling during the event if players wanted one of the featured S-Rank items immediately.

Trial and Reward Details

Beyond the banners, the event offered audition stages where Proxies could test Dialyn, Hugo, Corin, and Billy. To access the content, players needed to reach Inter-Knot Lv. 8 and unlock the Event feature in the Main Story Prologue - Intermission. Upon clearing an audition stage for the first time, players could claim rewards directly from the results screen.

The event also included a small convenience feature for the A-Rank trial rewards. If a player had already completed the Cooperation Exercise stage for one of the listed A-Rank Agents, they could claim the corresponding test-stage reward in the event interface without clearing the audition again. This made the trial portion less repetitive for long-time players who had already spent time with Corin or Billy.

What does this mean for players reviewing the event in 2026? The banner details reinforce how Zenless Zone Zero separates limited Agent channels from W-Engine channels, and how specific pity counters work. At the same time, the Dialyn and Hugo lineup showcased a deliberate pairing of Stun and Attack identities, supported by double A-Rank Physical Attack options. That combination gave the Version 2.4 Signal Search period a clear identity and made it one of the more focused pulling windows for players building around aggressive, interruption-heavy rotations.