From the fourth location, to the camp below to meet the fifth Hilichurl Rogue.

Source: https://gamerant.com/genshin-impact-hilichurl-rogue-location-farming-route-treasured-wanderer-blooming-flower-yet-to-bloom/

The Anemo Hilichurl Rogue wields a large dagger infused with Anemo and uses that to attack foes at close range.

Source: https://screenrant.com/how-to-beat-hilichurl-tips-strategy-genshin-impact/

The little teleportation portal will be right next to the Teleport Waypoint on the hill, but players will need to be mindful as there will be a Hilichurl Rogue that will immediately attack on sight.

Source: https://gamerant.com/genshin-impact-where-all-fontaine-aircrafts-sogno-di-volare-hidden-achievement-guide/