Sylvari Solidarity achiv...
You need to play this mission as a sylvari nothing more.
https://forum-en.gw2archive.eu/forum/game/hot/Sylvari-only-achievement-required-for-meta/first#post5646185
Brandar – Kodash [DE]
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Played it. Couldn’t find a sylvari to talk to…
You have to choose staying in the camp and defent. It is a sylvari pact soldier
Need to choose stay in the camp
And you either need to be sylvari or join someone else leading the party who is sylvari.