Test case was Astorial but I've had this happen with a number of recruited and rescued allies just not work properly. Now they'll run around on the map normally while the game is up, but the moment I save it and close, the pawn and everything they were wearing just voips out of existence, the only thing that remains is a named sleeping spot for a while until the next save which clears that.

When hovered over with the cursor in debug mode the following error comes up (repeatedly):

Root level exception in OnGUI(): System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.GenLabel.BestKindLabel (Verse.PawnKindDef kindDef, Verse.Gender gender, System.Boolean& genderNoted, System.Boolean plural, System.Int32 pluralCount) [0x000ee] in <4e802577611b487897b01fd812711839>:0
at RimWorld.GenLabel.BestKindLabel (Verse.Pawn pawn, System.Boolean mustNoteGender, System.Boolean mustNoteLifeStage, System.Boolean plural, System.Int32 pluralCount) [0x00313] in <4e802577611b487897b01fd812711839>:0
at Verse.Pawn.get_KindLabel () [0x00000] in <4e802577611b487897b01fd812711839>:0
at Verse.Pawn.GetTooltip () [0x0001a] in <4e802577611b487897b01fd812711839>:0
at Verse.TooltipGiverList.DispenseAllThingTooltips () [0x00120] in <4e802577611b487897b01fd812711839>:0
at (wrapper dynamic-method) RimWorld.MapInterface.DMD<DMD<MapInterfaceOnGUI_BeforeMainTabs_Patch1>?-1924492800::MapInterfaceOnGUI_BeforeMainTabs_Patch1>(RimWorld.MapInterface)
at RimWorld.UIRoot_Play.UIRootOnGUI () [0x0001f] in <4e802577611b487897b01fd812711839>:0
at Verse.Root.OnGUI () [0x0003d] in <4e802577611b487897b01fd812711839>:0
Verse.Log:Error(String, Boolean)
Verse.Root:OnGUI()

What's odd is when I go into the bio of the pawn, it clearly says Female, so I'm not sure where this variable is reading and why it's separate from the bio's.