Ronalda "Ronnie" Anne Santiago^{[​n 1]} is a supporting character from The Loud House (1960 and 2016 versions) and Gravity Falls (1960 version), the main protagonist of TLH60's spin-off, The Casagrandes (1968 version) and TLH16's spin-off, The Casagrandes (2019 version), and the main character of GF60's spin-off, Star vs. the Forces of Evil (1968 version). She is Lincoln's other best friend and former classmate. She also happens to be the younger sister of Lori's boyfriend Bobby.

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