Underspace has an AI voice system that actively narrates some of your actions. That's AI as in your ship's onboard computer. Not AI like machine learning, sit back down you nard.
Anyway, you can add your own voice packs into this like other games, and they'll narrate your actions. I know deep deep down you want your favorite video game waifu to comfort you in the cold vastness of magical space, so here's how you do it.
First, you need to go to your game's persistent data path. By default this is under AppData/LocalLow/Pastaspace Interactive/
Create a new folder called "Voices", if there isn't one already
Any subfolder with valid files inside of it will be recognized as a voice preset:
IE AppData/LocalLow/Pastaspace Interactive/Voices/Todd Howard/
Would create a preset in the game called "Todd Howard".
Within that subfolder add or create voice files with the following names to replace the AI voice's narration.

These files must be .wav files, and must be in 16 or 32-bit PCM format.

The following filenames will correpsond to the following actions:

computerReplacementVoice_Dock
Will play if it the player attempts to dock.

computerReplacementVoice_DockQueue
Will play if the docking queue is full and the player is foolishly on automatic docking.

computerReplacementVoice_Goto
Will play if the player has enabled autopilot and commanded that it go to a location.

computerReplacementVoice_DockDenied
Plays if dock is denied for any reason.

computerReplacementVoice_FormationLost
Plays if the convoy you're formed on is no longer available.

computerReplacementVoice_WaypointReached
Plays when you're reached the final object in a waypoint path.

computerReplacementVoice_DangerMissile
Plays when it detects any incoming guided projectile.

computerReplacementVoice_DangerMine
Plays when it detects ambient space mines.

computerReplacementVoice_DangerExplosiveParticles
Plays when your ship detects ambient volatile materials around you.

computerReplacementVoice_DangerRadiation
Plays when harmful radiation is detected.

computerReplacementVoice_DangerStorm
Plays when first entering or detecting an incoming storm.

computerReplacementVoice_DangerAnomalies
Plays when detecting any anomalous readings or dangers.

computerReplacementVoice_DangerCorona
Plays when you are entering a sun's corona and are at risk of dying horribly.

computerReplacementVoice_DangerAtmosphere
Plays when you are entering a planet's atmosphere and are at risk of dying horribly.

computerReplacementVoice_TractorFailure
Plays when you fail to loot anything, either due to your cargo being full or there being no available loot.

computerReplacementVoice_CargoJettisoned
Plays whenever you eject cargo in space.

computerReplacementVoice_ShieldFailed
Plays when your shields go offline.

computerReplacementVoice_ShieldRestored
Plays when your shields are restored.

computerReplacementVoice_HullBreach
Plays when you get to very low health.

computerReplacementVoice_LaneDisrupted
Plays when a laneline gets disrupted.

Once in, you can switch over to a narration override in game, under your audio settings.