A character fromGetsuyoubi no Tawawa.Kouhai-chan's senior coworker, who is also her unofficial self-appointed guardian from those who seek to exploit her when she's off-guard, especially when she's drunk. His protectiveness becomes a factor in him bonding withKouhai-chan's college friendRikei-chan(post #3622784), as sheused to do the same thingback in the day. His name is written 先パイ, which is a pun on 先輩 ("senior, upperclassman") by way of how the second kanji is pronounced identically to the second half of オッパイ (oppai, meaning "breasts").