Mona

Astral Reflection

Hydro
Catalyst
5★
Mondstadt
Ascension stat: Energy Recharge

A mysterious young astrologer who proclaims herself to be "Astrologist Mona Megistus," and who possesses abilities to match the title. Erudite, but prideful.

What it costs to finish this character

1,350

resin, level 1 → 90 and all three talents to 10

2,072,500

mora

days at a minimum, if you spend nothing else

Ascension alone: 760 resin (boss drops only) · talents alone: 590 resin.

Talent domain: Resistance, open Tuesday, Friday, Sunday.

A Crown of Insight is needed for the tenth level of each talent, and crowns are not farmable at any resin price — they come from events.

Materials and mora above are exact, straight from the game’s own tables. The resin figure and the day count divide by an average drop per run, which the game does not publish — they are a community-measured mean, not a promise.

Materials

Ascension, level 1 to 90
Material	Total
Varunada Lazurite Gemstone	6
Cleansing Heart	46
Varunada Lazurite Chunk	9
Energy Nectar	36
Varunada Lazurite Fragment	9
Shimmering Nectar	30
Varunada Lazurite Sliver	1
Philanemo Mushroom	168
Whopperflower Nectar	18
Mora	420,000

One talent, level 1 to 10
Material	Total
Ring of Boreas	6
Crown of Insight	1
Philosophies of Resistance	38
Energy Nectar	31
Guide to Resistance	21
Shimmering Nectar	22
Teachings of Resistance	3
Whopperflower Nectar	6
Mora	1,652,500

The talent table is for one ability. Levelling all three costs three times as much.

Talents

Ripple of Fate

Normal Attack

Performs up to 4 water splash attacks that deal Hydro DMG.

Charged Attack

Consumes a certain amount of Stamina to deal AoE Hydro DMG after a short casting time.

Plunging Attack

Gathering the might of Hydro, Mona plunges towards the ground from mid-air, damaging all opponents in her path. Deals AoE Hydro DMG upon impact with the ground.

Ripple of Fate scaling, level 1 to 10
Level	1	2	3	4	5	6	7	8	9	10
1-Hit DMG	37.6%	40.4%	43.2%	47.0%	49.8%	52.6%	56.4%	60.2%	63.9%	67.7%
2-Hit DMG	36.0%	38.7%	41.4%	45.0%	47.7%	50.4%	54.0%	57.6%	61.2%	64.8%
3-Hit DMG	44.8%	48.2%	51.5%	56.0%	59.4%	62.7%	67.2%	71.7%	76.2%	80.6%
4-Hit DMG	56.16%	60.37%	64.58%	70.20%	74.41%	78.62%	84.24%	89.86%	95.47%	101.09%
Charged Attack DMG	149.72%	160.95%	172.18%	187.15%	198.38%	209.61%	224.58%	239.55%	254.52%	269.50%
Charged Attack Stamina Cost	50.0	50.0	50.0	50.0	50.0	50.0	50.0	50.0	50.0	50.0
Plunge DMG	56.8%	61.5%	66.1%	72.7%	77.3%	82.6%	89.9%	97.1%	104.4%	112.3%
Low/High Plunge DMG	113.63%/141.93%	122.88%/153.49%	132.13%/165.04%	145.35%/181.54%	154.59%/193.10%	165.17%/206.30%	179.70%/224.45%	194.23%/242.61%	208.77%/260.76%	224.62%/280.57%

Mirror Reflection of Doom

Creates an illusory Phantom of Fate from coalesced waterspouts.

Phantom

Has the following special properties:

·Continuously taunts nearby opponents, attracting their fire.

·Continuously deals Hydro DMG to nearby opponents.

·When its duration expires, the Phantom explodes, dealing AoE Hydro DMG.

Hold

Utilizes water currents to move backwards swiftly before conjuring a Phantom.

Only one Phantom created by Mirror Reflection of Doom can exist at any time.

Skilled astrologers have always dreamed of using a phantom facsimile of themselves to ward off imminent ill fate, but Mona must be the first to make such a mockery of it in all of Teyvat.

Mirror Reflection of Doom scaling, level 1 to 10
Level	1	2	3	4	5	6	7	8	9	10
DoT	32.0%	34.4%	36.8%	40.0%	42.4%	44.8%	48.0%	51.2%	54.4%	57.6%
Explosion DMG	132.80%	142.76%	152.72%	166.00%	175.96%	185.92%	199.20%	212.48%	225.76%	239.04%
CD	12.0s	12.0s	12.0s	12.0s	12.0s	12.0s	12.0s	12.0s	12.0s	12.0s

Stellaris Phantasm

Mona summons the sparkling waves and creates a reflection of the starry sky, applying the Illusory Bubble status to opponents in a large AoE.

Illusory Bubble

Traps opponents inside a pocket of destiny and also makes them Wet. Renders weaker opponents immobile.

When an opponent affected by Illusory Bubble sustains DMG, it has the following effects:

·Applies an Omen to the opponent, which gives a DMG Bonus, also increasing the DMG of the attack that causes it.

·Removes the Illusory Bubble, dealing Hydro DMG in the process.

Omen

During its duration, increases DMG taken by opponents.

It was from the time that gods first traced the lights in the heavens with their eyes that the notion of "fate" was born.

Stellaris Phantasm scaling, level 1 to 10
Level	1	2	3	4	5	6	7	8	9	10
Illusory Bubble Duration	8.0s	8.0s	8.0s	8.0s	8.0s	8.0s	8.0s	8.0s	8.0s	8.0s
Illusory Bubble Explosion DMG	442.40%	475.58%	508.76%	553.00%	586.18%	619.36%	663.60%	707.84%	752.08%	796.32%
DMG Bonus	42.00%	44.00%	46.00%	48.00%	50.00%	52.00%	54.00%	56.00%	58.00%	60.00%
Omen Duration	4.0s	4.0s	4.0s	4.5s	4.5s	4.5s	5.0s	5.0s	5.0s	5.0s
CD	15.0s	15.0s	15.0s	15.0s	15.0s	15.0s	15.0s	15.0s	15.0s	15.0s
Energy Cost	60	60	60	60	60	60	60	60	60	60

Constellations

C1 · Prophecy of Submersion
When any of your own party members hits an opponent affected by an Omen, the effects of Hydro-related Elemental Reactions are enhanced for 8s:
· Electro-Charged DMG increases by 15%, Lunar-Charged DMG increases by 15%, Vaporize DMG increases by 15%, Hydro Swirl DMG increases by 15%, Lunar-Crystallize DMG increases by 15%.
· Frozen duration is extended by 15%.
C2 · Lunar Chain
When a Normal Attack hits, there is a 20% chance that it will be automatically followed by a Charged Attack.
This effect can only occur once every 5s.
C3 · Restless Revolution
Increases the Level of Stellaris Phantasm by 3.
Maximum upgrade level is 15.
C4 · Prophecy of Oblivion
When any party member attacks an opponent affected by an Omen, their CRIT Rate is increased by 15%.
C5 · Mockery of Fortuna
Increases the Level of Mirror Reflection of Doom by 3.
Maximum upgrade level is 15.
C6 · Rhetorics of Calamitas
Upon entering Illusory Torrent, Mona gains a 60% increase to the DMG of her next Charged Attack per second of movement.
A maximum DMG Bonus of 180% can be achieved in this manner. The effect lasts for no more than 8s.

Weapons and artifacts

UNSURE This is not a tier list and not community guidance — this product has neither. It is a mechanical shortlist, and the rule is printed so you can check it: Catalysts of 4★ and above whose secondary stat is one this character’s ascension stat scales with, ordered by base attack at level 90. Weapon passives are not weighed, because a passive is an effect and not a number.

Weapons of the right type and stat
Weapon	Rarity	Base ATK at 90	Secondary stat
Crane's Echoing Call	5★	741	ATK%
Angelos' Heptades	5★	741	ATK%
Skyward Atlas	5★	674	ATK%
Memory of Dust	5★	608	ATK%
Royal Grimoire	4★	565	ATK%
Wine and Song	4★	565	Energy Recharge
Hakushin Ring	4★	565	Energy Recharge
Oathsworn Eye	4★	565	ATK%

Sets whose two-piece bonus raises this character’s Hydro damage or the stat they ascend into
Set	Two-piece	Four-piece
The Exile	Energy Recharge +20%	Using an Elemental Burst regenerates 2 Energy for all party members (excluding the wearer) every 2s for 6s. This effect cannot stack.
Scholar	Energy Recharge +20%	Gaining Elemental Particles or Orbs gives 3 Energy to all party members who have a bow or a catalyst equipped. Can only occur once every 3s.
Heart of Depth	Hydro DMG Bonus +15%	After using Elemental Skill, increases Normal Attack and Charged Attack DMG by 30% for 15s.
Emblem of Severed Fate	Energy Recharge +20%	Increases Elemental Burst DMG by 25% of Energy Recharge. A maximum of 75% bonus DMG can be obtained in this way.
Nymph's Dream	Hydro DMG Bonus +15%	After Normal, Charged, and Plunging Attacks, Elemental Skills, and Elemental Bursts hit opponents, 1 stack of Mirrored Nymph will be triggered, lasting 8s. When under the effect of 1, 2, or 3 or more Mirrored Nymph stacks, ATK will be increased by 7%/16%/25%, and Hydro DMG Bonus will be increased by 4%/9%/15%. Mirrored Nymph stacks created by Normal, Charged, and Plunging Attacks, Elemental Skills, and Elemental Bursts exist independently.
Silken Moon's Serenade	Energy Recharge +20%.	When dealing Elemental DMG, gain the Gleaming Moon: Devotion effect for 8s: Increases all party members' Elemental Mastery by 60/120 when the party's Moonsign is Nascent Gleam/Ascendant Gleam. The equipping character can trigger this effect while off-field. All party members' Lunar Reaction DMG is increased by 10% for each different Gleaming Moon effect that party members have. Effects from Gleaming Moon cannot stack.
Celestial Gift	Energy Recharge +20%.	If the equipping character has completed Witch's Homework, after they use an Elemental Skill, they gain "Light's Guidance" for 20s: All nearby party members gain a 20% Elemental DMG Bonus corresponding to the equipping character's Elemental Type. The equipping character can trigger this effect while off-field. DMG Bonuses provided by Artifact Sets with the same name do not stack.\n· When your party has the Hexerei: Secret Rite effect, Light's Guidance is upgraded to "Mortal Hymn": All nearby party members gain a 40% Elemental DMG Bonus corresponding to both the equipping character and the current active party member's Elemental Type instead. If both characters have the same Elemental Type, these bonuses will not stack.

To turn this into a real recommendation section, add a build dataset — per character, the weapons and sets a community source actually recommends, with the rotation each assumes. Nothing in the game’s published data contains that judgement, and a ranking invented here would be indistinguishable from a researched one, which is why there is not one.

Teams

To build a team section, add team data. Which characters go together is judgement about rotations, energy and shielding that this product does not receive and will not guess at.

What is published is the reaction chart. Hydro takes part in:

Vaporize with Pyro
Frozen with Cryo
Electro-Charged with Electro
Bloom with Dendro