Where are Yianaros's field NPCs?

While exploring I found Yanaros's field node. The node manager is the rock, but on radar (see print) there seems to be a second hidden npc called Yanaros Spirit (can see the name on hover).

The thing is that I cannot find him/it. It appears as a question mark (so it was not met) on radar. How do I find him?

Note: I don't see any mention of the npc in knowledge list (H, under Characters->Kama).

The Yianaros Spirit hides from Players, meaning it is a little difficult to talk to the NPC. If you sneak up to her, you can get close enough to talk to her.

Quick Edit: I also found this during a Google search:

– Description: Yianaros is the Node Manager of Yianaros's Field. You may think it looks like an ordinary stone but this stone is actually the spirit Yianaros hiding from you. The beautiful garden is tended to by Yianaros, but she only appears when there is no one else around. Therefore, there is yet a single adventurer who has seen the true form of Yianaros.

From BDdatabase.net.