俄

Left person radical 亻 — the side-form of 人. Originally 俄 meant 'leaning person' (still in 俄顷 'in a moment, at a tilt of time'); the human radical carried that 'a person inclining' picture. The modern 'Russia' sense is a 19th-century phonetic loan that ignores the original meaning but kept the human radical by graphic accident.

Right component supplies the sound: 我 wǒ → É with vowel and tone shift. Pure phonetic role — the 'I' meaning of 我 plays no part. Same phonetic in 哦 ó (oh), 鹅 É (goose), 饿 È (hungry), 蛾 É (moth) — a tight É-cluster. The country name 俄罗斯 is a Qing-dynasty transliteration of 'Россия,' shortened to plain 俄 in compounds (中俄, 苏俄).