AN 3

Unique Robot, though saying that is redundant because she's the only one of her kind. However you can ritual with her to unlock the Robot special-form, which reveals that Robots have Aegis as a potential skill.

Found on forest tile events if there is free space in the party. When the event triggers your party's Mana will be drained and you will be given options to salvage, recruit or leave her alone. Salvaging will give you the powerful Blaster weapon, the recipe to craft more, and some crystals. Otherwise you can choose whether she joins your party or not. Note that there appears to be a time limit to recruiting her, if you go too long without recruiting AN_3 she starts showing up in the rival Druid/Prince's party.

AN_3 has 2 quests tied to her, both of which require her to be in your party:

Quest 1 triggers on snow tile events. She will gain 5 Max Levels and lose her Infertile trait.

Quest 2 triggers in cave portal events, which you can choose to ignore. You will be given a wide selection of options, listed below, from which you can pick one. Whichever one you pick, it will boost her Max Level by 5, even no change:

This changes her movement type to flying
 * JetPack/Jet propulsion: change movement type/action

This gives her the special traits Magic Vision and Agile
 * Sonar: grants Magic Vision and agility

This upgrades her LaserBeam to RailGun, which reduces Mana and cooldown by 50% while increasing range by 50%
 * RailGun: upgrade LaserBeam (more efficient)

This swaps her KnockBack for Explosion and increases her Magic by 2
 * Exploding/Explosive: powerful selfdestruction skill

This changes her KnockBack to PowerPunch and increases her Magic by 2
 * Strength/Power: increase physical power and learn new skill

This upgrades her ForkedLightning to ChainLightning, letting the attack jump an additional time, and increases her Magic by 1 and Mana by 5
 * ChainLightning: Upgraded ForkedLightning

This doubles her energy/milk storage, increases her Mana by 10, and gives her the Abdomen trait
 * Energy/Tank: increases milk/energy capacity. Can drain energy when fucked

This boosts her relation to you by 50, and gives you 2 CrystalFragments and 5 Iron in crafting materials
 * No change

Overall AN_3 is a solid unit that you can customize to a degree, with good skills, defensive capabilities, and able to hit Max Level 25 if you boost her with Kings Potions before doing her quests. Be mindful of her attack skills, as they can hit other party members if they are within range. She can also be utilized in Breeding, with her Energizer trait that gives eggs 50% growth progress from conception. If you combine it with Hatcher, which is available when creating the MC, it's possible to make eggs hatch immediately.