Nero (she/her)
In system: A fictive of Nero Claudius from the Fate series. Often habitually punctuates her sentences with her source's iconic "umu". Discovered after making an "of course I know her, she's me" joke about her source; it's unclear whether that caused her to form, or whether she already existed.
In source: The Heroic Spirit of Nero Claudius Caesar Augustus Germanicus, summoned as a Servant by Kishinami Hakuno to participate in the Moon Cell Holy Grail War, and later by Fujimaru Ritsuka to aid the Chaldea Security Organization during the Grand Order incidents. Avatar credit: NIAN_QAQ on Twitter