Kertabumi and Wisnu stayed long enough on the coast to take care of Langit. There was an oddity that was enough to make them curious about Langit's body, because if you just looked at it from the outside, the young man was exactly like them, like a human. However, while he was resting, the two kept watching as Langit's wounds slowly healed on their own.
Both Wisnu and Kertabumi were used to treating minor injuries while they were explorers. Wisnu, in particular, is well-versed in medicine and the treatment of serious wounds on the human body.
They know how long it takes for the human body to recover after treatment and what stages the body will go through. However, in this case, everything looks so odd.