The veteran activist said she was proud of MPs from her National League for Democracy for rallying around Htin Kyaw, a close aide and longtime friend, who will now lead the former junta-run country in her place as it embarks on a new era of democratic rule.
She also thanked the millions of voters who handed her party a whopping election win in November polls, the freest in generations.
Though Htin Kyaw took the title of president yesterday following a parliamentary vote, he hailed the day as "Suu Kyi's victory".
The taciturn but wildly popular democracy icon is blocked from the top office by a junta-era charter. But she has vowed to stay in control of the party by directing Htin Kyaw from behind the scenes.
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Myanmar's still-powerful military also said it was "pleased" with his presidency and vowed to cooperate with the NLD, a party packed with democracy activists once jailed by the army for protesting its harsh rule.
"The Tatmadaw (Myanmar army) will go on to cooperate with (his government) and carry out every upcoming process for peace, stability, unity and development," the army said in a statement.
Htin Kyaw will be sworn in on March 30 and replace Thein Sein, the retired general credited with guiding Myanmar out of bleak junta rule as president of a quasi-civilian government that took over in 2011.
But the new government will still face a heap of challenges, including poverty, civil wars in ethnic minority borderlands and decrepit infrastructure.
A key task will be managing relations with the military, which still retains a significant wedge of power in parliament and controls the vital home, defence and border ministries.