HEY! he posted before i said that he had the correct answer, can you do that!?...

Anyway it is quite obvious when you came up with the answer for this riddle so he was probably right in doing so and giving us a new riddle right away...

Friendly Yan
My looks may be deceiving, it looks like a yan but isn't a real one
but it doesn't matter,
because you'll only meet me once. you'll only fight it once and even then ther's nothing to worry about since it won't attack you

After the family reunion,not before!,
is when you'll see me. you only fight it after you've met all the other friendly creatures otherwise it'll run away

My name is "dry fly annie", "dry fly annie" is an anagram for "friendly yan"
pleased to meet ya'! basically means that it's friendly

Alright you're up Quin 'n' Tonic...well you already are but still you all know what i mean...