If i were you, due to their size i would probably include a threshold of bravery (to compliment charges and invoke suprise over the ferocity of these mice-people in battle, meaning you can make them smaller and weaker than a kobold to good effect), a good amount of isolationist intolerance of others, very low base amounts of cruelty, high orderlyness, curiousity, excitement, altruism and just a streak of michevious as a wild-card defining factor (besides them fawning over paladin justice/administration via orderlyness)
As a end result you end up with extremely inquisitive creatures with a inherent mischievous streak (whether it affects them no doing as you ask or meddling with levers at random like gremlins remains to be seen presumably as long as its within the law) but are also resolute in trying to not give into those urges via a orderly society. They are kind to their own but look suspiciously if not a little anxiously at others.
Played around with personalities (untested in fortress mode, but comes out fairly well in adv. mode) and turned out quite well... They're trusting, kind and prefer to help those in need, somewhat excitement seeking, insanely brave despite their height, despise other cultures and races and tend to give into flights of fancy and extremely curious.
[PERSONALITY:IMMODERATION:0:55:100]
[PERSONALITY:STRESS_VULNERABILITY:0:45:100]
[PERSONALITY:BASHFUL:0:45:100]
[PERSONALITY:SINGLEMINDED:0:55:100]
[PERSONALITY:ART_INCLINED:0:60:100]
[PERSONALITY:PERSEVERANCE:0:45:100]
[PERSONALITY:VENGEFUL:0:25:50]
[PERSONALITY:ANXIETY_PROPENSITY:0:50:75]
[PERSONALITY:TRUST:0:50:85]
[PERSONALITY:ACTIVITY_LEVEL:50:75:100]
[PERSONALITY:GREED:0:25:50]
[PERSONALITY:PRIDE:0:55:100]
[PERSONALITY:VANITY:0:55:100]
[PERSONALITY:EXCITEMENT_SEEKING:50:75:100]
[PERSONALITY:CURIOUS:50:75:100]
[PERSONALITY:HUMOR:50:75:100]
[PERSONALITY:CRUELTY:0:25:50]
[PERSONALITY:DISCORD:0:25:50]
[PERSONALITY:ORDERLINESS:0:50:10]
[PERSONALITY:DUTIFULNESS:0:50:100]
[PERSONALITY:BRAVERY:75:90:100]
[PERSONALITY:ALTRUISM:75:90:100]
[PERSONALITY:IMAGINATION:50:75:100]
[PERSONALITY:TOLERANT:0:15:25]
Running into an issue regarding overall hair length (is always shown as being extremely long), fur descriptions and male facial hair aren't showing despite having the correct tokens.
[SELECT_CASTE:ALL]
[CASTE:MALE]
[MALE]
[SET_BP_GROUP:BY_TYPE:LOWERBODY][BP_ADD_TYPE:GELDABLE]
[BODY_DETAIL_PLAN:FACIAL_HAIR_TISSUE_LAYERS]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[PLUS_TL_GROUP:BY_CATEGORY:EYELID:EYELASH]
[TL_COLOR_MODIFIER:BLACK:1:BROWN:1:LIGHT_BROWN:1:DARK_BROWN:1:TAN:1:AUBURN:1:CHESTNUT:1:SLATE_GRAY:1:CREAM:1:BEIGE:1:ASH_GRAY:1::IVORY:1:FLAX:1:GOLDENROD:1:OCHRE:1:PALE_BROWN:1:TAUPE_SANDY:1]
[TLCM_NOUN:hair:SINGULAR]
[TL_COLOR_MODIFIER:GRAY:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:40:0:70:0]
[TL_COLOR_MODIFIER:WHITE:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:70:0:90:0]
[SET_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:HIGH_POSITION:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyebrows:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:EYELID:EYELASH]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyelashes:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:0:0:0:0:0:0:0]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_RATE:1:DAILY:0:1000:0:0:NO_END]
[APP_MOD_DESC_RANGE:10:25:75:100:125:150]
[TISSUE_LAYER_APPEARANCE_MODIFIER:CURLY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:GREASY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[TISSUE_STYLE_UNIT:HAIR:STANDARD_HAIR_SHAPINGS]
[TSU_NOUN:hair:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[TISSUE_STYLE_UNIT:BEARD:STANDARD_BEARD_SHAPINGS]
[TSU_NOUN:beard:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[TISSUE_STYLE_UNIT:MOUSTACHE:STANDARD_MOUSTACHE_SHAPINGS]
[TSU_NOUN:moustache:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[TISSUE_STYLE_UNIT:SIDEBURNS:STANDARD_SIDEBURNS_SHAPINGS]
[TSU_NOUN:sideburns:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:BODY_UPPER:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:BODY_LOWER:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:LEG_UPPER:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:LEG_LOWER:HAIR]
[TL_COLOR_MODIFIER:BLACK:1:BROWN:1:WHITE:1:GRAY:1:LIGHT_BROWN:1:DARK_BROWN:1:TAN:1:AUBURN:1:CHESTNUT:1:SLATE_GRAY:1:CREAM:1:BEIGE:1:ASH_GRAY:1::IVORY:1:FLAX:1:GOLDENROD:1:OCHRE:1:PALE_BROWN:1:TAUPE_SANDY:1]
[TLCM_NOUN:fur:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:0:0:0:0:0:0:0]
[APP_MOD_NOUN:fur:SINGULAR]
[APP_MOD_RATE:1:DAILY:0:1000:0:0:NO_END]
[APP_MOD_DESC_RANGE:10:25:75:100:125:150]
[TISSUE_LAYER_APPEARANCE_MODIFIER:PLUSH:0:70:90:100:110:130:200]
[APP_MOD_NOUN:fur:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:SOFT:0:70:90:100:110:130:200]
[APP_MOD_NOUN:fur:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:SILKY:50:80:90:100:110:120:150]
[APP_MOD_NOUN:fur:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
Did play around with a fortress before I added in personalities and removed [variable_value] token from their entity file (cultural values kept swinging wildly... now they are static) and had a micekin pupsplosion... 11 and 12 pups in a single litter from my militia commander and a legendary glassmaker... restricted the pups to a nursery burrow with food, beds, toys, decorations and a well (with grate) yet they ended up remaining with the mother after a lengthy [Cancels Work, Seeking Infant] spam; any method of keeping the pups in the burrow and allowing the mother to continue their duties?