I'd like a collection of these too, I'm very sad that I didn't have drg at 50 during that cutscene where Ser Aymeric presents Estinien to you. I heard about your character having a startled reaction, but Estinien assures you that he comes as an ally instead of a foe as he'd suppressed the power of the eye, or something along those lines.

During the quest "Lost in the Lifestream", if you have Summoner unlocked, when you speak to Tataru she says this:
Citation Envoyé par Tataru
If memory serves, Y'shtola's sister is named Y'mhitra.
...Oh, you know her, do you? Well then, that ought to make things easier!
Though I don't remember if Y'mhitra herself shows any indication she recognizes you when you go talk to her (I don't have screenies of it, at any rate).

"One More Night in Amdapor", the quest to unlock the hardmode version of Lost City of Amdapor, when you talk to Raya-O-Senna, if you did the lv50 White Mage job quest:
Citation Envoyé par Raya-O-Senna
Ah, Master A-Towa's successor is come! To no other would I entrust this task!
Much earlier in the MSQ, when Tataru disappeared to study arcanima, if you have Arcanist at 30(?):
Citation Envoyé par Thubyrgeim
...So you are acquainted with our newest member. <sigh> An arcanist of your experience must see that her potential is somewhat lacking.
During your pilgrimage after the Dragonsong war is over, when you go to Ul'dah and find servants searching for Nanamo, if you're a Lalafell they comment that they're looking for "someone your height".

Similarly if you're a Lalafell during a certain part of the HW Hildibrand quests: