Leaks for Lucia’s kit in Zenless Zone Zero shows she could arrive as a Ether support that mix offensive strikes, some defensive tool, and buffs for team. The way her skills are designed seems to focusing on building Dream Points often, so she can keeping her mechanics active while also letting allies deals steady damage through long fights.
Abilities

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Lucia’s basic chain is up to five Ether-charged strike, with the final one turns into a Echo Strike that summons a spirit-like form doing area damages. These attacks provides some control against groups while also creates Dream Points. Her dodge and assist actions widen this kit further, if she times a counter right, she triggers another Echo Strike that hits with Ether and give even more Dream Points, so her gauge don’t really run empty even when playing defensively.
Special Attack

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The Special Attack uses Echo Strike in a straight Ether slash, though she can pushes it further into Grand Echo Strike for stronger power. When upgraded, the move adds a Force Through buff, scaling off Lucia’s max HP, which in turn lift Sheer Force for the whole squad. If she casts it during her Ether Veil: Health state, the buff keep going for longer, keeping her role balanced between supports and damage at the same time.
Ultimate

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Her ultimate, called Resonant Strike, makes her dash in a spirit-like form, giving strong interruption resistance plus high damage cut. During this, her HP cannot fall below one, so it work both as survival and as a heavy attack. The dash finishes with a Ether blow that also spawns a healing zone for allies. If it is used under Ether Veil: Health, the zone stay longer, putting her as a key anchor during extended battle.
If the leaks stays accurate, Lucia could becomes one of the strongest Ether supports in Zenless Zone Zero, blending her own durability with sustains and buffs for the squad. That combinations would make her highly valuable for teams that depend on synergy and drawn-out rotation.
