Since I have played and finished the game, here is the first part of spirits from Astral Chain that I made, this half will be for neurons workers.
Spirit: Alicia Lopez
Type: Support Advanced Spirit that takes up one slot.
Effect: Item Gravitation
Opponents:

(Dark Blue Suit) and

(Border Collie and American Black Duck)
Stage: Frigate Orpheon(Battlefield Form)
Rules
-Defeat the main fighter to win(Zero Suit Samus)
-The enemy is made of metal(Duck Hunt)
-The enemy prefers to use melee weapons.
-Items Spawn: Grass
Music: Emergency
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Origin
The Duck Hunt Puppet represents The Beast Legion, Alicia's former legion.
The Grass item is a reference to the beast legions tracking senses.
Spirit: Jin Wong
Type: Primary Ace Spirit that has 3 slots.
Effect: Physical Attacks
Opponents:

(Water Camouflage) and

(World Circuit Suit)
Stage: Fourside(Battlefield Form)
Rules
-Defeat the main fighter to win(Snake)
-The enemy is giant and made of metal(Little Mac)
-The enemies punches increase strength after a while.
Music: Legion Assault
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Origin
The stage represents Neuron HQ where all of the ark's police force reside including Jin.
The Little Mac represents The Arm Legion, Jin's former legion.
Spirit: Olivia Espinosa
Type: Support Advanced Spirit that takes up one slot.
Effect: Ray Gun Equipped
Opponents:

(Cordelia's Colors),

(Default), and

(Blue Ganon)(If Akira was playable he/she would be the second fighter)
Stage: Castle Siege(Throne Room)
Rules
-Defeat the main fighter to win(Lucina)
-The enemy is made of metal(Ganondorf)
-The enemy is equipped with a ray gun.
-The enemy's shield has increased defense.
Music: Ark Sewer Management(Combat Phase)
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Origin
Spirit: Brenda Moreno
Type: Support Novice Spirit that takes up one slot.
Effect: Shield Increase
Opponents:

(White Clothes) and

(Default)
Stage: Fourside
Rules
-The enemy heals after a while.
Music: Tasks Forces Neuron
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Origin
The Rules is a reference to Brenda selling medicine and AED charges to help the player.
Spirit: Maxmillion Howard
Type: Primary Legendary Spirit that has no slots.
Effect: Shield Increase
Opponents:

(Radiant Dawn Age) and

(Blue Ganon)
Stage: Final Destination
Rules
-Defeat the main fighter to win(Ike)
-The enemy is made of metal(Ganondorf)
-The enemies shield has increased defense.
-The enemies sword attacks have increase power.
Music: Awakening
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Origin
The Ganondorf Puppet represents the Axe Legion, Max's former legion.
The shield increase is a nod to the axe legions energy barrier which protects the player.
the sword attack increase is a nod to the axe legions second attack when using the barrier.