Si-Flachitt served as a general in the New Republic Defense Force, commanding a division for the New Republic's military leadership throughout the Galactic Civil War. During 5 ABY, Si-Flachitt, along with other leaders, was present at a meeting where participants provided updates via hologram. Si-Flachitt's report focused on border skirmishes with the New Separatist Union, which was another galactic government.
The character Si-Flachitt was shown as a hologram within Victory's Price, a 2021 novel. This novel concluded the Star Wars: Alphabet Squadron trilogy, authored by Alexander Freed.