他是回忆不是痛她是幸福不是梦
[tā shì huí yì bù shì tòng tā shì xìng fú bù shì mèng]
This online name implies a bittersweet sentiment: 'He' represents the past which is cherished but not painful anymore; 'She' brings happiness, making life feel dreamlike. It suggests a mix of nostalgia and hope.