Undertale - Sybil Reference sheet

Hello Guys
I (finally) decided to draw my oc of Undertale, Sybil
ATTENTION! I'M ITALIAN, I DON'T KNOW IF I WROTE CORRECTLY.
so, some details:
♥she is a robot, she was created by Alphys
♥she is shy, insecure and she doesn't speak much
♥on the head she has two antennas: these can catch the lightnings and transfer them in any object (she can also attack with the lightnings, but only in self-defense)
♥when she is happy, she emits pink sparks on the antennas

♫Relationships with other characters♫
♦Alphys: mom
♦Mettaton: best friend
♦Frisk: little sister
♦Undyne: monster to be admired
♦Sans: little boss
♦Papyrus: comedian
♦Toriel: dear friend
♦Grillby: friend ^{(she secretly love him, but she doesn't tell anyone}