[Q] Fusion of 2 emojis.ttf topic

Hello everyone,
first, sorry if my english is bad, I'm french --"
I have a little problem on my S5Active, i prefere certains emojis, but ther is less emojis that in the usual collection
So my question is, Can we fusion 2 files .ttf to complete one with the other ?
Thank you :)
I hope be clear
Tancrède