Gecko grants Shuichi a reptilian appearance and the ability to cling onto walls and other sheer surfaces.
Gecko appears to have strong adherence power, since Shuichi can remain attached even to fast-moving vehicles.
Gecko is noted to be a rather weak and unimpressive Quirk, even among Shuichi's reptilian family.
Shuchi uses this primarlily in urban areas, where walls are plentiful.
Due to its environmental limitations, Spinner doesn't have many opportunities to utilize his Quirk outside of urban areas, where walls are plentiful.