Talk:Mecha Eli-chan/@comment-203.176.182.162-20171030033228/@comment-182.30.75.96-20171030133947

Finish the main story of the Halloween event, and you'll unlock a quest that gives the "E Reactor" (pink heart item) as a reward. The "E Reactor" can then be traded for EITHER Mecha Eli-Chan OR Mecha Eli-Chan MKII; you can only choose one.

Afterwards, you need to finish missions for her ascension materials (pink/orange sugar cube/marshmallow things) and NP upgrade trade-in materials (purple hearts). You'll most likely end up having to finish almost everything either way, admittedly.