Resized to 36% of original (view original)

Artist's commentary
Le Malin? Stink!
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◢◤ ▐ ▐▉
▗◤ ▂ ▗▖ █▎
◤ ▗▅▖◥▄ ▀◣ █▊
▐ ▕▎◥▖◣◤ ◢██
█◣ ◥▅█▀ ▐██◤
▐█▙▂ ◢██◤
◥██◣ ◢▄◤
▀██▅▇▀
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
Le Malin's CN name = 恶毒, which is one character away from 恶臭 (the mentioned 'Stink').
Said 恶臭 is used to describe Inmu's Yajuu Senpai, who's represented in ASCII above. (further info here and here)
TLDR: It's one big, dumb, Sino-Japanese meme
Many thanks to @Zaregoto and @Damian0358 for deciphering this mess.