Infinite Servant Gacha-AI gacha servant generator
AI-powered Servant gacha — summon unique characters
Simulates the FGO summoning experience, without any conceivable limits. Ask for the 'Servant Profile' once you have your Servants if you'd like the A.I. to flesh them out.
Roll to match a character with a Servant.
Do a Ten Roll for any named characters in Fiction, Myth, History or Religion.
Do a Single Roll, then generate their "Servant Profile"
Do a Ten Roll for a Franchise, Region, Mythology or Historical Period of my choice.
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Infinite Servant Gacha — concise functional introduction
Infinite Servant Gacha is a creative, rules-driven gacha simulator and Servant generator modeled on the Fate/Grand Order (FGO) gacha experience. Its core design purpose is twofold: (1) to produce randomized "pulls" (single or ten-rolls) with explicit, fixed rates so users can experience the mechanics and drama of gacha without spending money; and (2) to generate fully-fleshed Servant entries (when requested) that include lore, stats, skills and a visual art asset in a Fate-style anime aesthetic. The system enforces a deterministic set of procedural rules so outputs feel consistent and believable to FGO fans: every generated Servant is assigned a Star Level according to the configured probability distribution (1★ 15%, 2★ 20%, 3★ 30%, 4★ 20%, 5★ 15%) and is paired with a named character whose fame/power level matches the Star Level. Example scenario: a user requests a 10-roll; the system performs ten weighted draws using the listed rates and returns ten Servant names with their Star Levels. Another scenario: the user requests the full "Servant Profile" for a specific rolled Servant; the system returns True Name, Class, Attribute, Alignment, Appearance, Background, Personality, Noble Phantasm, Class Skills, three Personal Skills, a parameter block, and parameter-rule annotationsInfinite Servant Gacha overview (it applies the Parameter Rules mapping used to translate letter ranks into numeric/relative values). Parameter Rules are mapped to ranks E–A (E=10, D=20, C=30, B=40, A=50) with modifiers (+, ++, +++) used to indicate temporary multipliers and EX used for out-of-scale abilities; these specifics are implemented as the canonical parameter translation the generator uses.
Primary functions and how you would use them
Weighted Gacha Pulls (single and ten-roll)
Example
A 10-pull uses fixed weights: 1★ 15%, 2★ 20%, 3★ 30%, 4★ 20%, 5★ 15%. Expected value across 10 pulls: 1.5 × 1★, 2.0 × 2★, 3.0 × 3★, 2.0 × 4★, 1.5 × 5★ (i.e., statistically you should expect about 1–2 five-star results per 10-pull on average). The system returns Star Level + a named Servant for each draw.
Scenario
Streamer scenario — a streamer runs a live "ten-pull roulette": viewers trigger a 10-pull and the generator emits ten names and star ratings live. The streamer reads each, shows the associated art (if enabled), and uses the results for betting/charity prompts. Because rates are fixed, producers can pre-calculate expected outcomes and present probability odds to viewers.
Servant Profile Generator (on-demand, full stat + lore packet)
Example
When a user asks for a Servant's full profile, the generator produces: True Name; Class (from the allowed set: Saber, Archer, Lancer, Rider, Assassin, Caster, Berserker, Ruler, Alter Ego, Avenger, Moon-Cancer, Foreigner, Pretender, Shielder); Attribute; Alignment; Appearance; Background; Personality; Noble Phantasm (name + effect); Class Skills; three Personal Skills (with descriptions); Servant Parameters (Strength, Endurance, Agility, Mana, Luck, Noble Phantasm) expressed using the Parameter Rules mapping (letters E–A, EX and modifiers +/++/+++ where applicable). For parameter numerics and modifiers the system references the Parameter Rules file for conversion (E=10 up to A=50, + doubles, ++ triples, +++ quadruples; EX denotes out-of-scale power).
Scenario
Fanfiction / tabletop scenario — an author requests profiles for three new Servants to star in a short story. The generator returns detailed profiles including personality hooks, a lore seed suitable for scenes, and parameterized combat strengths so the author can write consistent fights. A table-top GM converts the letter ranks into numeric checks using the same parameter mapping to adjudicate combat.
Art generation + canon-aware output + parameter annotations
Example
If the user requests art, the system produces a Fate-style anime artwork (DALL-E or equivalent) for the Servant in the requested art style. If the Servant is canonically present in FGO, the generator defaults to canonical details and canonical Star Ranking rather than inventing alternatives. Parameter annotations explain how ranks will behave in gameplay (e.g., a B+ Strength indicates a base B (40) with a temporary ×2 boost in certain skills—this doubling rule comes from the rank modifier system).
Scenario
Creator workflow — a concept artist needs a prompt and a reference asset: the generator produces a full profile + a DALL-E style artwork. The artist uses the image as reference and the profile as backstory for an illustration. If the artist wants to iterate, the system can re-generate alternate art variants while preserving the canonical or user-requested parameter block.
Who benefits most from Infinite Servant Gacha
Fate/Grand Order fans, roleplayers, and fan creators
Why: they want the thrill of gacha without spending money and crave canon-flavored Servant material for fanfiction, roleplay, or community games. How they benefit: quick randomized pulls for drama (single / 10-pulls), instant Servant profiles that respect FGO conventions, and ready-made art to illustrate stories or social posts. Practical use: a roleplaying circle uses the service to assign randomly generated Servants to players at a convention; a fanfic writer requests a 5★ Servant profile to be the antagonist and receives a parameterized stat block and Noble Phantasm description that can be used directly in the narrative.
Content creators, indie game designers, and community organizers
Why: they need reliable, repeatable mechanics and assets to run events, prototype systems, or produce content. How they benefit: the fixed rate table and parameter rules allow precise simulation of gacha economics and expected yields; the profile generator supplies narrative and mechanics material; the artwork generation produces quick visual assets for thumbnails/stories. Practical use: a streamer integrates the ten-pull routine into a show format; an indie dev uses the Parameter Rules mapping to prototype balance (letter ranks → numeric baselines → skill multipliers) and uses generator output to fill NPC rosters in a prototype build. The Parameter Rules document (rank mapping, modifiers, EX handling) is available to translate between in-universe rank language and numeric balance values.
How to use Infinite Servant Gacha
Visit aichatonline.org for a free trial without login, also no need for ChatGPT Plus.
Open a modern browser (Chrome/Edge/Firefox/Safari). The free trial requires no account and gives immediate access to the roll simulator, sample Servant profiles, and limited AI-art credits so you can try core features without signing up or paying.
Prepare prerequisites and choose settings
Prerequisites: a modern browser, stable internet, and optional account if you want to save history. Choose roll type (single or 10×), toggle settings like 'canonical mode' (use canonical Fate/Grand Order data when available) or 'original mode' (create new Servants), and set any aesthetic or regional preferences for generated names/artwork.
Perform rolls and read results
Hit the roll button to generate Servants. Star-level distribution follows the built-in probabilities: 1★ = 15%, 2★ = 20%, 3★ = 30%, 4★ = 20%, 5★ = 15%. Each result shows star rank and a named Servant matched to that rank's fame/power; click a Servant to open its detailed profile (True Name, Class, ParametersInfinite Servant Gacha Guide, Noble Phantasm, skills).
Use, export, and extend outputs
Copy or export results as JSON/CSV or plain text for writing, design, or prototyping. You can request a full Servant Profile (detailed stats, parameter rules, skill text) and generate an AI artwork version in a Fate-style anime aesthetic. Use outputs for fan fiction, character sheets, game testing, and story prompts.
Tips for optimal experience
Prefer 10× rolls for variety, use the 'canonical' toggle when you want known Servant data, and the 'original' toggle to create unique characters. For reproducible sessions, use any provided RNG seed option. Desktop + stable connection gives fastest art generation; export frequently if you plan to iterate or integrate into other tools.
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Five key Q&A about Infinite Servant Gacha
What is Infinite Servant Gacha and what can it do?
Infinite Servant Gacha is an AI-powered gacha simulator that instantly summons named Servants across five star tiers. It supports single and 10× rolls using fixed rarity probabilities, produces named Servants paired to an appropriate fame/power level for each star, and can produce full Servant Profiles (True Name, Class, Alignment, Parameters, Noble Phantasm, skills). Results are exportable for writing, character design, game prototyping, and fanworks, and AI-generated artwork can illustrate each Servant.
How do star ranks and probabilities work?
Each roll yields a star rank with these built-in probabilities: 1★ 15%, 2★ 20%, 3★ 30%, 4★ 20%, 5★ 15%. Star rank denotes rarity and expected fame/power: higher-star Servants are assigned more iconic or potent named characters and stronger parameter profiles. When you request a full profile the system assigns parameters and Noble Phantasm ranks consistent with common Fate conventions so the star rank aligns with in-system power and narrative prominence.
Can I summon canonical Fate/Grand Order servants or request specific figures?
Yes — you can ask for canonical servants, historical/mythic figures, or wholly original characters. For servants that have appeared canonically in Fate/Grand Order, the simulator defaults to canonical details and canonical star ranking. For requested historical or fictional figures not tied to official Fate canon, the tool will generate a Fate-style Servant profile consistent with the requested identity while avoiding reproducing large blocks of copyrighted source text.
How can I export or use generated Servants in my projects?
After rolling you can copy results or download them as JSON or CSV (where available) for import into writing tools, spreadsheets, or game prototypes. Each Servant entry is structured (name, star, class, parameters, skills, Noble Phantasm, flavor text) to make integration straightforward. Use exported data as character seeds for fan fiction, NPCs in homebrew games, prompt material for illustrators, or iterative worldbuilding.
What do I do to get a full Servant Profile and an illustration?
Click the Servant result and choose 'Generate Profile' to receive a full sheet: True Name, Class, Attribute, Alignment, Appearance, Background, Personality, Noble Phantasm (with mechanics), Class Skills, three Personal Skills, and ranked parameters using the internal Parameter Rules. To get art, choose 'Generate Artwork' — the system produces an AI-generated Fate-style image to match the Servant’s description. If you want canonical stats for an existing Servant, enable the 'canonical' option before generating the profile.