Following this Aniimo walkthrough for the main storyline is your ticket to unlocking a lot of key features.
It may have a focus on catching and hatching cute critters to flesh out your Aniilog as you explore its dense open-world, but there is a main story that I recommend focusing on first, as unlocking features such as daily tasks, increased storage limits, the Holo-Battle Sim are all up for grabs.
This Aniimo guide features our in-progress Aniimo walkthrough and list of story chapters, including what unlocks and when.
Aniimo walkthrough
Here is an in-progress list of quest steps, chapter-by-chapter, with a short summary of what's involved, with sub-objectives and unlocks noted as indented bullet points.
A quick note on quest progression
Advancing the main quest will eventually become a bit of a grind, thanks to it asking you to reach high player levels. It's at this point where exploring the open world in earnest really pays off, as you'll extra player EXP (Safari) for earning Bronze and Silver Collection Badges in each area.
Also, be sure to complete your dailies, battle Alpha Aniimo for the first time, and pick up any Lumin Amber collectibles on your travels to maximize those Safari EXP gains.
Prologue
Here's what to expect from Aniimo's Prologue:

An Idyllic Trip
- Catch the Emberpup
- Burn the vines blocking the path and enter the valley
Aniimo Catching Journey
- Catch a Hummin, Skippy, and Celestis
- Talk to Nicole
- Catch up to BINI
The Mysterious Cavern
- Keep going forward to explore the mysterious cavern
- Choose Helion or Lunara as your starter Aniimo
- Follow Helion and Lunara to see what's happening
- Defeat the Summoned Helgon
- Defeat the Summoned Infergon
- You can now evolve your starter Aniimo in battle
- Twining with Aniimo unlocked
Institute Initiation
- Follow Nicole on a tour of the Institute
- Character menu unlocks
- (Optional) Talk to Bohr by the Holographic Discovery Booth
- Report to Dr. Lewis
- Use the nearby teleporter to go to Idyll
- Upload your catch results at the Research Console
- Aniimo Management menu unlocked
- Aniilog unlocked
- Talk to Dr. Lewis about the results
- Follow Dr. Lewis out of the Outpost
Setting Out Again
- Follow Nicole down to the Bloom
- Map unlocked
- Collect Lumin Amber before heading to the Branch (2)
- Collect a Blessed Budclaw to collect Lumin Amber
- Follow Nicole to the river
- Gather Lumin Amber from the river
- (Optional) Explore the Idyll ruins
- Go to the Branch and activate it
- Talk to Dr. Lewis
- Follow Helion/Lunara up the nearby hill and touch the feather
Chasing the Clouds
- Jump off the hill and glide to the grassland
- Activate the Bloom
- Talk to Senior Sheepy (Bespectacled Nimbi)
- Twine with an Emberpup and blend in with the Emberpup family
- Follow the Emberpup family
- Enter the giant cube and pass the Sanctum's trial
- Collect chests, reach the depths of the Sanctum, and repair the Vein
- Catch a Flutternym and Iris
- Talk to Senior Sheepy
- Defeat the Alpha Turbo
- (Optional) Pick an Aniipod and claim your rewards
- Go back to Senior Sheepy
- Promotion to 'Beginner Student'
- Aniimo level cap raised to 25
- Elite Training tasks unlocked
- Events menu unlocked
- Institute Guide menu unlocked (including daily activities)
- Shop unlocked
- Season Hub menu unlocked (including 'Companion Handbook' battle pass)
Chapter 1 - First Steps With Aniimo: Forest of Falling Stars
Here's what to expect from Aniimo Chapter 1:

Go to Bloomville
- Follow the marker to the outskirts of Bloomville
- (Optional) Catch three sleeping Aniimo
- Proceed to Bloomville
- Find the source of the fragrance
Ceremony Preparations
- Enter Bloomville and activate the Bloom
- Talk to Sunia
- Visit the plaza and inspect the stone statues
- (Optional) Talk to Jessica
- Greet the elder
- Talk to Selene
- Catch a Dewy
- Twine with Dewy and gather Duskwhispers
- Fly back to the nest and craft Duskwhisper Aromathysts
- Go to Arlo to process the Aromathysts
- Learn how to make perfumes from Sunia
- Craft the perfume with Sunia's help.
- Use ethanol as a solvent
- Stir the mixture
- I picked Flutternym scales here and made Dreamy Mystery
- Go to the elder's house
- Set the time to night and go to the second floor to rest
- Go to the mirror and claim the Bloomville-themed outfit
- Go to the Bloom Festival outside
The Unbegun Ceremony
- Look for Sunia
Fragrant Colors (Part 1)
- Complete Elite Training - Chapter 1 tasks (4)
- Go to the Bloom Festival
- Activate the Bloom in the Forest of Falling Stars
- Catch 1 Eko and 1 Pomegg in Forest of Falling Stars
- Level 2 Aniimo up to Level 25
- Catch and report 30 Aniimo in total
- Defeat the Alpha in Forest of Falling Stars: Stellarys
- Earn the Bronze Collection Badge in Forest of Falling Stars
- Reach Level 25
Dewdrop Crystals of the Sea of Flowers
- Go to the Sea of Flowers and talk to Wally
- Defeat Wally
- Return to the Outpost and report to Dr. Lewis
- Take the 'Intermediate Student' promotion test:
- Answer 1 - All of the above
- Answer 2 - All of the above
- Answer 3 - All of the above
- Promoted to 'Grade II Student'
- Aniimo level cap increased to 35
Chapter 2 - Charge Into Battle!
Here's what to expect from Aniimo Chapter 2:

Fragrant Colors (Part 2)
- Go to the Sea of Flowers
- Look for where the Irises gather
- Twine with an Iris and dance with the Irises
- Find the Irisal
- Battle the Irisal
- Look for where the Flutternyms gather
- Catch a Flutternym
- Go to the marker and craft the fragrance
- Head to Lumenfly Valley
The Land of Dancing Illusions
- Light the Incense and open the barrier to Lumenfly Valley
- Twine with an Aniimo in the Fluternym family and venture deeper into Lumenfly Valley
- Bring Sunia back
The Land Where Dreams Come True
- Talk to Snowy
- Gather the Butterfly Shadows scattered by the dream blossom
- Follow the Flutternym shadows to gather the next dream blossom
- Keep going up to gather more Bufferfly Shadows
- Go to the Somniwing's throne at the top
- Don't forget to activate the Bloom on your way!
- Defeat Velouria
Ancient Sacred Fragrance (Part 1)
- Talk to Velouria
- Complete tasks in in Elite Training - Chapter 2 (4)
- Visit the place where dreams come true
- Earn the Bronze Collection Badge in Beast Fang Ridge
- Own your Homeland (Complete 'Prologue: The Wondrous RV' quest)
- Own 1 Aniimo with Resonance raised to Gamma Stage
- Challenge the Alpha of Argent Strait: Tubster
- Defeat the Alpha in Beast Fang Ridge: Scorchhowl
- Spend 150 Primegy in total
- Reach Level 35
- Answer Dr. Lewis' call
- Go to Beast Fang Ridge and talk to Jilly
- Defeat Jilly in battle
- Return to the Outpost and report to Dr. Lewis
- Advance to 'Veteran Student' by taking the promotion test:
- Answer 1 - All of the above
- Answer 2 - Defeating Alpha Aniimo
- Answer 3 - All of the above
- Promoted to 'Grade III Student'
- Aniimo level cap increased to 40
Chapter 3 - Vein's Power: Song of the Echobacks
Here's what to expect from Aniimo Chapter 3:

Ancient Sacred Fragrance (Part 2)
- Learn about Held Items from Dr. Lewis
- Go to the Mistwoods entrance
- Search for the Super Truffle
- Defeat Tucking to get the Super Truffle
- Give the Super Truffle to Sunia
- Go to Echoback Landing
- Gather the Incense of Tolerance at Echoback Landing
- Defeat Aged Omega Sherro to obtain the spice
- Give the salt to Sunia
- Complete tasks in in Elite Training - Chapter 3 (4)
- Equip 1 Epic Held Item on an Aniimo
- Venture deeper into the Mistwoods and obtain the Super Truffle
- Earn the Bronze Collection Badge in Echoback Landing
- Infuse Energy into the Branch in Breezy Plains a total of 15 times
- Nurture the ecosystem once in Breezy Plains
- Earn the Silver Collection Badge in Mistwoods
- Defeat the Alpha of Echoback Landing: Panpanta
- Reach Level 40
Astranite of Berylline Vale
- Answer Dr. Lewis' call
- Go to Berylline Vale
- Change to nighttime and talk to Loulla
- Join the midnight concert
- Defeat Loulla
- Go to the Outpost and talk to Dr. Lewis
- Advance to 'Beginner Wayfarer' by taking the promotion test:
- Answer 1 - Defeat the Alpha Aniimo
- Answer 2 - Glacy
- Answer 3 - Throw a Sparkling Cube at any Aniimo
- Promoted to 'Wayfarer I'
- Aniimo level cap increased to 45
- Talk to Dr. Lewis
Chapter 4 - Potential Awakened: Pulse of the Berylline Vale
Here's what to expect from Aniimo Chapter 4:

Ancient Sacred Fragrance (Part 3)
- Complete tasks in in Elite Training - Chapter 4 (4)
- Go to Echoback Landing and search for salt
- Perform Capability Awakening for Aniimo 5 times
- Earn the Bronze Collection Badge in Berylline Vale
- Complete 5 Pathfinder Challenges in total
- Spend a total of 200,000 Credits
- Catch the Alpha in Berylline Vale: Bouldus
- Earn the Silver Collection Badge in Blitzwood
- Reach Level 45
Rosetower Woods' Core Radiance
- Answer Dr. Lewis' call
- Talk to Senior Xiaochen/Aster in Rosewater Woods
- Defeat Aster
- Return to the Outpost and talk to Dr. Lewis
- Advance to 'Wayfarer II' by taking the promotion test:
- Answer 1 - Wait for special weather
- Answer 2 - Pathfinder Challenge
- Answer 3 - Defeating Alpha Aniimo
- Promoted to 'Wayfarer II'
- Aniimo level cap increased to 50
- Holo-Battle Sim unlocked
Chapter 5 - Proof of Trials: Dance of Flowers and Thorns
Here's what to expect from Aniimo Chapter 5:

Ancient Sacred Fragrance (Part 4)
- Go to the Russet Highlands and search for the Incense of Courage
- Complete the 'Warrior' Journey side quest
- Talk to painter Sorora
- Follow the marker to find clues in the Russet Highlands
- Twine with Helmut and shatter the Dragonclaw Stone
- Defeat the Infergon and revive Pawney's legend
- Pick up the Flame Flower in the middle of the boss arena
- Return to Sorora
- Talk to Sunia
- Visit Velouria
- Watch Sunia create the Aeon incense
Rainbow of the Ground
- Complete tasks in in Elite Training - Chapter 5 (4)
- Obtain the Flameheart Stone and give it to Sunia
- Earn the Bronze Collection Badge in Rosewater Woods
- Use Nurture 5 times in total in Breezy Plains
- Use Nurture 20 times in total in Breezy Plains
- Complete 1 Easy Holo-Battle Sim
- Upgrade any Held Item to level 5
- Earn the Silver Collection Badge in Russet Highlands
- Reach Level 50
- Advance to 'Wayfarer III'
I'll update this walkthrough with more quest steps when I reach them.