洛初余温

'The remaining warmth from Lu City'. In China, 洛 (Lu) can also mean a surname. However, since 洛 can also denote Luoyang (an ancient city), 初 (initial stage / encounter), 余温 (the warmth that lingers); together, they create imagery like the lingering warm afterglow of sunset over the city of Lu, the first encounter with someone/something, or a lingering sentiment/memory in early times. Thus, this username seems poetic and nostalgic.