He was the son of the Lord Ma’afu Tukui’aulahi, Tevita ‘Unga Tangitau, and Hon.

[6] Upon the death of his father, Lausiʻi was installed as Ma’afu, Lord of Vaini and Tokomololo.

He was elected to the Legislative Assembly as a Nobles' Representative for Tongatapu, receiving ten votes from fellow electors of the nobility.

[11] Following the 2014 election, Maʻafu was reappointed Minister of Lands, becoming the only noble representative in the cabinet of ʻAkilisi Pōhiva.

[14] He returned to Cabinet following the DPFI's landslide[15] in the 2017 election, but resigned in March 2018 after a dispute with Minister of Police Mateni Tapueluelu.