How do you get Karakawa with the console?

effect create_artifact_karakawa_armor_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

Personal artifact · Armor

Karakawa

Famed

Karakawa is a famed armor artifact in Crusader Kings III: Prowess +1, Monthly Renown +5%, Led by owner extra advantage +2, Enemy Fatal Casualties +3%. Quality 70 and wealth 70; maximum durability 100, and it does not wear out. At game start it goes to the holder of Kanmu Family (starts from 867.1.1). Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (2)

What does Karakawa do in CK3?: Prowess +1, Monthly Renown +5%, Led by owner extra advantage +2, Enemy Fatal Casualties +3% (patch 1.20.0.3).
How do you get Karakawa with the console?: effect create_artifact_karakawa_armor_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

This finely crafted suit of ō-yoroi armor is an heirloom of the Taira family, and is said to have been a gift from the nephew of Kanmu Ten'nō.

Effects

Prowess+1
Monthly Renown+5%
Led by owner extra advantage+2
Enemy Fatal Casualties+3%

History and who has it

Made before recorded history.
At game start: the holder of Kanmu Family (starts from 867.1.1).

How it is made

The game creates it with the scripted effect create_artifact_karakawa_armor_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_karakawa_armor_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (karakawa_armor_modifier) and the English localisation, Crusader Kings III 1.20.0.3.