Lily won't use anything, even her default weapons.

[FilthyGravy]

Everything she's given goes unused and she's been fighting exclusively unarmed. Only place I could find where someone was having a similar issue is an eight year old Reddit thread, and it only offered a single, temporary solution. Said solution being use of the "equip" console command, but as soon as she switches weapons, it's back to unarmed. The only mods I have that might touch Lily's records in any way are JIP Companions Command and Control, Tale of Two Wastelands, and maybe a couple of dialogue mods (Wanderer Courier Soldier Spy and The Lone Courier's Dialogue).

[UnvalidUserName]

Lily, as all super mutants, can only use a handful of weapons due to animation constrains. Check the wiki to see if you have given her weapons she can actually use. Also, she can loose her companion weapons permanently if you go into a casino with her but this is fairly rare.

[FilthyGravy]

Lily, as all super mutants, can only use a handful of weapons due to animation constrains. Check the wiki to see if you have given her weapons she can actually use. Also, she can loose her companion weapons permanently if you go into a casino with her but this is fairly rare.

I have yet to enter any casinos let alone anywhere that requires weapons to be handed over with Lily. She's been unarmed since I first recruited her and I've made sure only to give her weapons I know Super Mutants can use. Firing and rehiring her doesn't work either, nor does rapidly telling her to switch between melee and ranged combat.

[UnvalidUserName]

I recommend you post your load order then, there must be some mod conflict that is causing this as this is not a a bug present in the vanilla game.

[FilthyGravy]

Found the culprit. It was The Lone Courier's Dialogue (The DC Origins version at least). Just one little record entry change in FNVEdit did the trick and it's now fixed.