Welcome to NGB and our Sirenmon Field Guide for Digimon Story Time Stranger! Sirenmon is an Ultimate generation Digimon that players can recruit in Digimon Story Time Stranger. This guide covers its base stats, where to find it, and the requirements needed to unlock its Digivolutions.
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Digimon Story Time Stranger Sirenmon Field Guide

Sirenmon Overview (In-Game Profile)
A Deity Digimon that looks like a mix between a bird and a fish. Cheerful by nature, Sirenmon is always seen singing happily in the air or sea. Its beautiful voice has a miraculous range of eight octaves, from ultra-low to ultra-high pitches. Sirenmon’s song can bring peace to even the most devastated battlefields.
They say a resplendent Digivolution awaits it in the future because of all the good deeds it’s performed by healing those who listen to it.
Sirenmon sings Symphony No. 1 in a high soprano that seeps into the listener’s heart, paralyzing their will and leaving them at the Digimon’s mercy.
It sings the solemn Symphany No. 2 in a low bass that transforms into a heavy, low-frequency vibration, crushing the enemy from the insides of their ear canals and leaving them unable to even stand.
Symphony No. 3 turns its voice into note-shaped bullets that it then fires at the enemy. These shots have a mysterious property, ricocheting on impact to always hit other foes as well.
Each of these techniques increases in power for every creature that sings along with Sirenmon, turning even the weak into a great strength.
Stats
Base Stats
Lv. 1
| HP | SP | ATK | DEF | INT | SPI | SPD |
|---|---|---|---|---|---|---|
| 2518 | 1858 | 537 | 843 | 2866 | 1578 | 1342 |
Lv. 99
| HP | SP | ATK | DEF | INT | SPI | SPD |
|---|---|---|---|---|---|---|
| 5213 | 3543 | 1470 | 1605 | 4975 | 2975 | 2275 |
Attribute Weakness
Having the Data attribute, Sirenmon is weak to Digimon with the Virus attribute, while resisting those with the Vaccine attribute.
Elemental Weakness
Sirenmon has the Deity type, which gives it a couple of weaknesses and resistances.
- Weaknesses: Plant, Earth
- Resistances: Wind, Null
Skills
Special Skill(s)
- Symphony No. 1
- 100% chance of 10% reduction to DEF for 3 turns
- 50% chance to apply Confusion
- Symphony No. 2
- 100% chance of 30% reduction to SPI & 10% reduction to ACU for 3 turns
- Symphony No. 3
- Performs Wind magic attack at power 90
- Increased damage to targets with Humanoid Trait
Learnable Attachment Skill(s)
- Gale Storm II (Lv. 2)
- Performs Wind magic attack at power 35
- 90% ACU
- Status Barrier (Lv. 20)
- 100% chance to apply Stat Debuff Immunity
- Holy Light II (Lv. 30)
- Performs Light magic attack at power 60
- 95% ACU
- X-Heal (Lv. 40)
- Greatly recovers HP
Where to Find Sirenmon
Sirenmon cannot be found in the Human or Digital Worlds. To add Sirenmon as a partner in Digimon Story Time Stranger, you’ll need to digivolve a lower-generation Digimon or de-digivolve a higher-generation Digimon into Sirenmon. Refer to the Sirenmon Digivolution section below for more information.
Sirenmon Digivolution
Digivolution is the process that allows your Digimon to grow stronger and unlock new forms. Each Digivolution path has specific requirements, such as reaching a certain level, achieving a minimum stat threshold, or meeting personality and bond conditions.
Some Digimon also require special items or story progression to evolve. Choosing when and how to Digivolve is essential, since certain evolutions may branch into multiple options, giving you flexibility in shaping your partner’s role in battle.
De-Digivolution
In Digimon Story Time Stranger, de-digivolution allows you to return a Digimon to a previous form. Unlike standard digivolution, which requires stat thresholds and level milestones, de-digivolution has its own conditions. To de-digivolve a Digimon, one of the following requirements must be met:
- Encounter requirement: The Target Digimon must have already been encountered at least once during your playthrough.
- Personality requirement: The Target Digimon’s base Personality must match the current Digimon’s Personality.
Meeting either condition will unlock the option to de-digivolve, giving you more flexibility in reshaping your team and experimenting with different evolutionary paths.
Sirenmon can de-digivolve into the following forms:
Digivolution
Digivolution is the process of evolving a Digimon into a stronger form. Each Digimon can evolve along multiple branches depending on its stats, level, and personality. To digivolve a Digimon, you must meet certain requirements.
Sirenmon can digivolve into the following forms:
| Digimon | Requirements |
|---|---|
| MarineAngemon | Agent Rank 7+ 1800 INT+ 2040 SPI+ |
| Ceresmon | Agent Rank 7+ 2470 Max HP+ 2190 SPI+ |
Related Digimon Story Time Stranger Content
- Complete Digimon Guide: Explore our Digimon Story Time Stranger Digimon Field Guide to view every Digimon, their stats, skills, digivolutions, and more!
- Personality Type Guide: View our Digimon Time Stranger Digimon Personality Guide to learn more about Digimon Personality Types!
- Main Page: Visit our Digimon Story Time Stranger Guides and Walkthroughs hub for all our latest content!
- Official Website: Check out the official Digimon Story Time Stranger website for news and updates!

