Rightfully是动画《哥布林杀手》的片头曲，由Mili演唱，收录于专辑《Rightfully》中。电视动画《哥布林杀手》改编自蜗牛くも创作的同名轻小说，于2018年2月宣布了动画化的消息。动画由WHITEFOX负责制作，于2018年10月6日至12月29日每周六在TOKYOMX、SUN电视台、BS11首播，中国大陆由爱奇艺独家正版发布，全13话。
Chained onto me
My adolescent dreams
Pulling dragged me deep
All my body exposed
Marked up by your shadows
Tighten up
Numb your senses
No fairness is needed for pigs
Laughters above
Playful smiles
Die get rolled
Bathe in sorrow
My tomorrow is built upon your flesh
Slay the last of your kind
To reclaim what's rightfully mine
I still dream of you
Will you be disappointed that I'm not who I used to be
Will you hold me tightly
Chained onto me
My adolescent dreams
Pulling dragged me deep
All my body exposed
Marked up by your shadows
Piece by piece the tables turn and turn again
In this eternal game
Biscuits with clotted dream and milk tea
Time to roll your d20
Gods nor demons ready to admit defeat
Eat up
Grind your teeth
They're not that much smarter than us
Laughters above
Playful smiles
Die get rolled
Swallow your fate
Lubricate our blades with blood and tears
And your piercing screams are music to celebrate
Infiltrate penetrate
Soon we'll have you destroyed
Back to the old days
Slay the last of your kind
To reclaim what's rightfully mine
Big Big World钢琴谱-Emilia Rydberg-简单版
Within钢琴谱-Mili-哥布林杀手OST
大大世界钢琴谱-Emilia Rydberg
Rightfully钢琴谱-OP-哥布林杀手
大切な人钢琴谱-Familiar
Familiar Memory钢琴谱-bomjiu
YUBIKIRI钢琴谱-Mili-GENMAN
Utopiosphere钢琴谱-Mili-Deemo游戏音乐
smiling钢琴谱-《怒火救援》插曲总谱-Harry Gregson-Williams
大大世界钢琴简谱-数字双手-Emilia Rydberg
烟火里的尘埃钢琴谱会弹唱谱-华晨宇
sweet devil钢琴谱-初音未来会版本
风再起时钢琴谱-张国荣
Surfboard Boogie钢琴谱-Martha Mier
Because He Lives钢琴谱-Bill Gloria Gaither
Bad Apple钢琴谱-ZUN
Pied Piper钢琴谱-防弹少年团 BTS
一笑江湖钢琴谱-闻人听书
记忆深处钢琴谱-朴正元
如果能在一起钢琴谱-梁静茹
Suspirium钢琴谱-Thom Yorke
Pink White钢琴谱-Frank Ocean
英雄落幕钢琴谱-燃烧的音符
轻漪的节音钢琴谱-HOYO-MiX
迷宫钢琴谱-七朵花