The geoglyphs in Zelda: Tears of the Kingdom are similar to the Captured Memories in Breath of the Wild. Finding each glyph's Dragon Tear will reveal a look into the past, specifically about Princess Zelda's whereabouts. Since these are from Zelda's perspective, it's only natural the primary focus would be on her, Rauru, and Sonia. However, Tears of the Kingdom introduces other characters and additions to the lore that unfortunately aren't as fleshed out as they could have been.