Surely God felt lonely letting his little Eve go

Field Tech

SKILLS

SkillWhoLearnedUsedDoes
CamperKenKen Lv 4Trek → campLets Ken camp (without it, only with a Disposable Tent)
ButcherbothKen Lv 6, Linda Lv 10Camp jobTurns carried animals into meat dishes, free
ForgerbothKen Lv 8, Linda Lv 12Camp jobTurns carried animals into equipment, free
AppraiserKenKen Lv 15MenuShows the price of the highlighted item or animal
Night OwlbothKen Lv 17, Linda Lv 23Night raidIf the camp is raided while you sleep, that human wakes up
GluttonbothKen Lv 24, Linda Lv 17AlwaysBlocks the bad effects of dung, poisonous or rotten herbs, rotten meat and five risky dishes
BloodhoundLindaLinda Lv 14TrekSays whether this area has a species you haven't filed or caught, and how strong the locals are
PerceiverLindaLinda Lv 26TrekRandom fortune. Flavour only. Full write-up: Woman's Intuition
TrapperKenKen Lv 26Camp jobMakes one free Makeshift Trap per night
TamerLindaLinda Lv 15Camp jobAdopts a carried animal as a hunting dog. Dogs
WhistlerKenYamada (B, C)TrekA giant bird flies the party back to W East Area
BotanistLindaDr. Flora (C only)AlwaysThe item Details popup (SELECT) shows each herb's real effect and risk
MaskerKenPoliska (B, C)TrekWild herds near you wander aimlessly for a short while
CatcallerLindaRanger in a tent (A, B, C)TrekWild herds near you walk straight at you for a short while

Picking a camp job from the Tech page also opens camp with that job preselected. Most buildings answer that a trek skill "can't be used here".

LEARNING BY LEVEL

A skill is learned when that character's level hits the number exactly. All three scenarios use the same table. Whether a multi-level jump can skip one is UNVERIFIED.

LevelKenLinda
4Camper
6Butcher
8Forger
10Butcher
12Forger
14Bloodhound
15AppraiserTamer (also unlocks the Dog breed)
17Night OwlGlutton
23Night Owl
24Glutton
26TrapperPerceiver

LEARNING FROM PEOPLE

SkillTeacherWhereScenariosCondition
WhistlerYamadaNeo Kenya Bank outlet, G FactoryB, CDeposits there reach his 60,000 G quota. He also gives Tissues and the Flowerseed Bag
MaskerPoliskaKoshikataB, CAnswer "Okay" when she asks you to recover the stolen Tiger Claw
BotanistDr. FloraFlora's LabC onlyWalk out after talking to her once you have heard Sophia's sakura request at the Green Mansion. Once only
CatcallerA ranger hiding in a tentYama Pit or XothA, B, CWhen he asks about the meteorite: "No, dude!", then the first diamond