1,129 Pages

The VF-31A Kairos is a variable fighter featured in the Macross Δ television series. It is the mainstay fighter for Alpha, Beta and Gamma Flight for Chaos.


Following the establishment of the New United Nations Government, new and better airframes were commissioned as concerns grew over the growing independence of long distance emmigrant fleets and distant colony worlds. The VF-31A Kairos was first developed by S.M.S.' Ouroboros Branch in cooperation with several other companies including Surya Aerospace and the LAI Corporation, and based on the high performance prototype YF-30 Chronos.[1] Research and design was provided by S.M.S. recruit Aisha Blanchette. Though superior in performance compared to the aging VF-171 Nightmare Plus fielded by the New United Nations Spacy, it proved inferior to the the Windermere Kingdom's Sv-262 Draken III.

A special multipurpose container unit was added from the YF-30 to enable enable multi-role functions in the battlefield. Some versions were outfitted with an Inertia Store Converter and EG-01M/MP EX-Gear system, however, due to the rarity of pure Fold Quartz crystals, a cheaper to produce Fold Carbon is used instead. This results in a drop in performance compared to the YF-30, but at least comparable to the VF-25 Messiah.

The private group Chaos would later use the Kairos as a base to develop the Seigfried series for Delta Flight, outfitting it with a Fold Resonance System.



  • ROV-127E 12.7mm Beam Machine gun x 1
  • AK/VF-M11 Assault Knife x 2
  • Howard LU-18A Beam Gun Pod x 1
  • LM-27s 27mm Rapid-fire Railgun Pod x 2
  • Internal Micro-missile Launcher x 6
  • Underwing Hardpoints for Pylon-carried Ordinance x 2


A number of VF-31A were supplied to the military division of Chaos, and each unit's performance during actual battle operations doubled as evaluation tests. Several units supplied to Delta Flight for the Ragna branch were heavily customized for escort duties of the tactical music unit "Walküre", and came to be known as "Seigfried".


  • VF-31A
    • Base model of the Kairos line, and there is one test bed transitional prototype for the Siegfried line given the same name. Equipped with a monocular main camera on the head and one gun. Its main color scheme is gray. Arad Mölders piloted the Kairos type prior to the formation of Delta Flight.
  • VF-31B
    • A mass produced variant.


Production RemarksEdit

The VF-31 and its variants were planned to adopt the same close-coupled delta wing as YF-30 Chronos, but it was ultimately dropped due to similarties with the Sv-262 Draken III and its double delta wing. Series organizers felt it would be too difficult for viewers to distinguish the main character's variable fighters, thus Delta Flight units adopted a forward-swept wing design.

The vertical tail is arranged inward in the middle of the forward wing (so the wings look like a "Δ" when viewed from the front). The main variable fighter type (Kairos) has a more close-coupled delta wing aircraft as it was originally intended by the series planners.

Other than the fighter's wings, the “folding of the nose”, “housing method of hands and legs”, “arm gun (mini gun pod)”, “large-sized canard ”, “division of the toes”, etc. have changed from the YF-30.

Notes & TriviaEdit

  • In Macross Δ Scramble, the two Chaos original characters have custom-colored Kairos units: Hans has a red fighter while Fan uses a blue one. The light-blue unit is used by Mina Forte in one of the bonus missions from DLC Pack 2. Each color can be freely selected by the player in the Hangar.
    • Also in Delta Scramble, the VF-31A Siegfried test bed model is unlockable for Version 1.02, featuring the same base color as the original Kairos but also has an ita-design of Freyja Wion and Mikumo Guynemer on the main body.


  1. Plastic model "Technique MCR13 VF-31A Kairos Fighter mode" Assembly Manual, 1/144 scale model, TOMYTEC, (2016)

Macross Δ Mechanics
Chaos / New United Nations Spacy
Variable Fighter
VF-1EX Valkyrie | VF-31A Kairos | VF-31B Kairos | VF-31C Siegfried | VF-31E Siegfried | VF-31F Siegfried | VF-31J Siegfried | VF-31S Siegfried | VB-6 König Monster | VF-22 Sturmvogel II | VF-171 Nightmare Plus
Vehicles, Destroids and Support Units
Destroid Cheyenne II | Glaug | Queadluun-Rare | ZBP-104 Regult
Cruiser / Mother Ship
Macross Elysion | Guantanamo-class | Megaroad-class | Northampton-class | Stealth Cruiser | Thuverl-Salan-class | Uraga-class
Aerial Knights
Variable Fighter
Sv-262Hs Draken III | Sv-262Ba Draken III
Cruiser / Mother Ship
Sigur Valens
Community content is available under CC-BY-SA unless otherwise noted.