| Kaidan Alenko | |
|---|---|
| Mass Effect character | |
 Kaidan from Mass Effect 3 | |
| First appearance | Mass Effect (2007) |
| Voiced by | Raphael Sbarge |
| In-universe information | |
| Home | Vancouver, Earth |
| Class | Sentinel |
| Skill | Biotics Technology |
Kaidan Alenko is a fictional character in BioWare's Mass Effect franchise, who acts as a party member (or "squadmate") in the first and third games in the series. The character is initially introduced in the original Mass Effect as a human Systems Alliance Officer and primary squad member in Commander Shepard's team. Kaidan's fate on the planet Virmire is part of a pivotal decision which the player has to make in order to advance the narrative.
If Kaidan survives the events of Mass Effect, by the events of Mass Effect 2 he is encountered on the human colony of Horizon after Shepard receives a tip that Horizon will be the next human colony to be abducted by the enigmatic race known as the Collectors. In Mass Effect 3, Kaidan initially appears at the Alliance base in Vancouver before taking off on a mission to Mars with Shepard and the crew of the Normandy SR-2. Kaidan is voiced by Raphael Sbarge.
Initially presented as a heterosexual love interest for a female Shepard in the first game, the character is reintroduced in Mass Effect 3 as a bisexual love interest, a decision by BioWare which attracted mostly praise as well as some criticism. Kaidan has received an overall mixed reception throughout his appearances in the Mass Effect trilogy.