。
Apparently she's happy.
Literal
She [topic-は] happy [it-seems-らしい].
~らしい ('it seems, apparently') marks inference from external evidence — what the speaker has heard or observed but doesn't directly know. Compare with ~ようだ ('seems, looks like'), which leans toward visual or sensory inference, and ~みたい (the casual cousin). After a noun or na-adjective, ~らしい attaches directly without だ: 幸せらしい, not 幸せだらしい. The simple bare construction here gives a soft, hearsay-tinged feel.